They are not shown because they are behind the p33 and in front of p34 respectively. Determine the number of neutrons, protons, and electrons in this ion. a. In this photo I present the electromagnetic laws governing the nuclear structure, but a student of Einstein (Dr Th. Selenium (Se). Se-30 has a mass number (A) of 30. Figure \(\PageIndex{1}\): Electrons are much smaller than protons or neutrons. The nucleus of an atom determines its mass number. 34 protons 44 neutrons 34 electrons. The number of neutrons is equal to the difference between the mass number … How many protons, neutrons, and electrons are in: 13 How many protons, neutrons, and electrons are in: 14 C14 6 Diagram of the nuclear composition and electron configuration of an atom of selenium-80 (atomic number: 34), the most common isotope of this element. Sciences, Culinary Arts and Personal Nevertheless today many physicist continue to apply not the well-established laws but the various fallacious nuclear structure models which lead to complications . In fact, here one can see the 9 charged quarks in proton and the 12 ones in neutron able to give the charge distributions in nucleons for revealing the strong electromagnetic force for the nuclear binding in the correct nuclear structure by applying  the laws of electromagnetism. The Se-82 has 14 extra neutrons which led me to discover  the structure of the above nuclides by using its high symmetry forming 14 blank positions able to receive 14 extra neutrons of opposite spins. Atomic Number – Protons, Electrons and Neutrons in Selenium. How many protons and electrons are in Se 78 34 2 References General Chemistry. When describing the properties of tiny objects such as atoms, we use appropriately small units of measure, such as the atomic mass unit (amu) and the fundamental unit of charge (e). The mass number 204 – 82 protons = 122 neutrons. © copyright 2003-2020 Study.com. However, we are told that the ion is charged. A Se ion has a mass number of 78 and a charge of -2. The number of electrons in a neutral atom is equal to the number of protons. This preview shows page 36 - 44 out of 71 pages. Es inestable con una vida media de 15 minutos, cada neutrón libre se descompone en un antineutrino, un protón y un electrón. Therefore,the number of neutrons in selenium (Se) is 45 here for this isotope.Remember that neutrons are present in the nucleous of selenium (Se) and it's charge is zero. Identify the missing information for each neutral isotope. Whereas the Se-80 of S=0  and Se-82  of S=0  (even number of extra neutrons)  contain 12 extra neutrons of opposite spin and 14 extra neutrons of opposite spin respectively. Calculate the number of protons, neutrons, and electrons in 210/ Pb4+. Name: Selenium Symbol: Se Atomic Number: 34 Atomic Mass: 78.96 amu Melting Point: 217.0 °C (490.15 K, 422.6 °F) Boiling Point: 684.9 °C (958.05005 K, 1264.8201 °F) Number of Protons/Electrons: 34 Number of Neutrons: 45 Classification: Non-metal Crystal Structure: Hexagonal Density @ 293 K: 4.79 g/cm 3 Color: gray Atomic Structure ... all protons are protons, which are different from neutrons. "Demokritos" (2002) NUCLEAR STRUCTURE REJECTS RELATIVITY, N.C.S.R. The nucleus consists of 34 protons (red) and 46 neutrons (blue). Protons- 82 Neutrons- 128 Electrons- 78 A _______ is a subatomic particle that has mass nearly equal to that of a proton, but it carries no electrical charge. When an atom is neutrally charged, the number of protons is equal to the number of electrons. Determine the number of neutrons, protons, and electrons in this ion. "Demokritos" (2002) NUCLEAR STRUCTURE REJECTS RELATIVITY, Historically the discovery of the assumed uncharged neutron (1932) along with the invalid relativity (EXPERIMENTS REJECT RELATIVITY) led to the abandonment of the well-established electromagnetic laws, in favour of various contradicting nuclear theories,  which could not lead to the nuclear structure. Selenium, Se, has an atomic number of 34 and hence it has a total of 34 protons. Be sure to answer all parts. Electrons account for the volume of an atom. Explanation of 4 Observations Three subatomic particles were proposed to explain the four observations made by Thomson and Rutherford: protons, electrons, and neutrons. Additional Practice. It is of interest to note that the two first extra neutrons like the n35(-1/2) and the n36(+1/2) fill the  two blank positions formed by p33n33 and p34n43 respectively. Protons. Asked by Wiki User. Because the mass number is the sum of neutrons and protons, it means that the number of neutrons is the difference between the mass number and the number of protons. The isotope is selenium-78 with a charge of 2-. What isotope is it? An atom contains protons (positively-charged particles), electrons (negatively-charged particles), and neutrons (neutrally-charged particles). Five of these isotopes are stable: 74 Se, 76 Se, 77 Se, 78 Se, and 80 Se. A se atom has a mass number 78. How much does does a 100 dollar roblox gift card get you in robhx? Palladium is a chemical element with atomic number 46 which means there are 46 protons in its nucleus.Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z.The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. For example, a carbon atom weighs less than 2 × 10-23 g, and an electron has a charge of less than 2 × 10-19 C (coulomb). A Se ion has a mass number of 75 and a charge of −2 . Number of protons in selenium (Se) is 34.Protons are present in the nucleus of selenium (Se) . For example the p13n13 is in front of p3n3 while the p20n20 is behind the p10n10. You can see my papers of nuclear structure in  my  FUNDAMENTAL PHYSICS CONCEPTS . A proton is one of three main particles that make up the atom. number of neutrons: number of protons: number of electrons: A neutral isotope has a mass number of 65 and 36 neutrons. Especially at all the symmetrical six horizontal  planes  one observes  24 deuterons of opposite spins. Especially the structure of Se-74 with S=0 contains four extra neutrons of opposite spin, while the Se-76 of S=0 contains six extra neutrons of opposite spins. Atomic Number – Protons, Electrons and Neutrons in Palladium. Thus it has five stable isotopes like Se-74, Se-76, Se-77, Se-78 and Se-80. How many electrons protons and neutrons does cesium have? e. 20 protons, 20 neutrons, and 22 electrons 7. If an electrons were the mass of a penny, a proton or a neutrons would have the mass of a large bowling ball! Selenium (atomic symbol: Se, atomic number: 34) is a Block P, Group 16, Period 4 element with an atomic radius of 78.96. Selenium (34 Se) has six natural isotopes that occur in significant quantities, along with the trace isotope 79 Se, which occurs in minute quantities in uranium ores. Here the 8  deuterons of opposite spins from p13n13 to p20n20 are not shown. - Biography, Atomic Theory & Discovery, Modern Atomic Theory: Electron Clouds, Schrodinger & Heisenberg, The Periodic Table: Properties of Groups and Periods, Chromatography, Distillation and Filtration: Methods of Separating Mixtures, Balancing Nuclear Equations & Predicting the Product of a Nuclear Reaction, Rate of a Chemical Reaction: Modifying Factors, Scalars and Vectors: Definition and Difference, Average Atomic Mass: Definition & Formula, Calculating Molarity and Molality Concentration, Early Atomic Theory: Dalton, Thomson, Rutherford and Millikan, CLEP Natural Sciences: Study Guide & Test Prep, Middle School Life Science: Tutoring Solution, Holt McDougal Modern Chemistry: Online Textbook Help, Praxis Chemistry (5245): Practice & Study Guide, College Chemistry: Homework Help Resource, CSET Science Subtest II Chemistry (218): Practice & Study Guide, ISEB Common Entrance Exam at 13+ Geography: Study Guide & Test Prep, Holt Science Spectrum - Physical Science with Earth and Space Science: Online Textbook Help, Biological and Biomedical Name: Selenium Symbol: Se Atomic Number: 34 Atomic Mass: 78.9 Number of Protons/Electrons: 34 Number of Neutrons: 45 Classification: Non-Metals Discovery: … How many protons, neutrons, and electrons are present in a single atom of selenium−78? Thus, it has a total of 36 electrons. There are as many electrons as there are protons. Become a member and unlock all Study Answers. 20 protons, 20 neutrons, and 18 electrons. However, when it is charged, the number of lost or gained electrons is equal to the charge. Fill in the blanks. If neutrally charged, the number of protons is equal to the number of electrons. a. Isotopes of an element differ in mass because the atoms have a different number of ___. Determine the number of neutrons, protons, and electrons in this neutral isotope. The Se-77which contains seven extra neutrons ( odd number) with S=-1/2 receives at blank positions  three extra neutrons of positive spin and four extra neutrons of negative spin. Therefore it has 30 nucleons in its nucleus. Under this physics crisis and using the charged UP and DOWN quarks , discovered by Gell-Mann and Zweig,  I published my paper “Nuclear structure is governed by the fundamental laws of electromagnetism ” (2003), which led to my discovery of the new structure of protons and neutrons given by, proton = [93(dud) + 5d + 4u ] = 288 quarks = mass of 1836.15 electrons, neutron = [92(dud) + 4u + 8d ] = 288 quarks = mass of 1838.68 electrons. In the diagram of the simple second horizontal plane you can see  these extra neutrons of negative spin filling the two blank positions between protons. In the same way all the next extra neutrons like the n41(-1/2), n42(+1/2, n43(-1/2), n44(+1/2), n45(+1/2), n46(-1/2), n47(+1/2) and n48(-1/2) are not shown because they are in front of p23, behind the p24, behind the p29,, in front of p31, and  in front of p26 respectively. Determine the number of neutrons, protons, and electrons in this ion. A Se ion has a mass number of 78 and a charge of -2. A Se atom has a mass number of 78. Try these on your own and check the answer below 78 Se 2-39 K + ANSWERS. The Se-82 is characterized unstable nuclide having a very long half life, and for practical purposes can be considered to be stable. Also the extra neutrons n37(+1/2), n38(-1/2), n39(=1/2) and n40(-1/2) of the first and sixth horizontal plane are not shown because they are in front  of the p1, behind the p12, behind the p2 and in front of p11 respectively. Su masa es 1/1,837 de la masa de un protón. The standard atomic weight of selenium (Se) is 78.96 g/mol (gram per mole). Kalogeropoulos ) criticised my discovery of nuclear force and structure by believing that the nuclear structure is due to the invalid relativity. Also the 14 extra neutrons of opposite spins are not shown. An atom with 68 neutrons and 50 protons has an atomic number of ____. Selenium (Se) with 34 protons (even number of protons) has a structure of high symmetry. Note that according to my discovery of the LAW OF ENERGY AND MASS the mass defect in the nuclear structure is due to the photon mass of the emitting dipolic photon presented at the international conference "Frontiers of fundamental physics" (1993) organised by the natural philosophers M. Barone and F. Selleri , who gave me an award including a disc of the atomic philosopher Democritus. Pressure: Definition, Units, and Conversions, Electron Configurations in Atomic Energy Levels, The Kinetic Molecular Theory: Properties of Gases, States of Matter and Chemical Versus Physical Changes to Matter, Boyle's Law: Gas Pressure and Volume Relationship, Chemical Reactions and Balancing Chemical Equations, Who Was John Dalton? Uploaded By brobroy. In the following diagram of Se-82 you see that the 64 nucleons with 32 protons and 32 neutrons from p1n1 to p32n32 have a structure of high symmetry . Why? The atomic number gives the number of ____ in the nucleus. Why don't libraries smell like bookstores? Learning objectives: After this activity, the student will be able to describe the basic structure of matter, name the parts of an atom, have experience using the Periodic Table, explain elements, and have the background to understand isotopes. Especially at the square of p33n33 and n35p35 one observes the two extra neutrons n(-1/2) and n(-1/2) filling the two blank positions formed by the p33 and p21 as well as by p35 and p22. STRUCTURE OF Se-74, Se-76, Se-77, Se-78, Se-80 AND Se-82, Selenium (Se) with 34 protons (even number of protons) has a structure of high symmetry. a. The number of electrons in each of Selenium's shells is 2, 8, 18, 6 and its electron configuration is [Ar] 3d 10 4s 2 4p 4. From the charge, we know that the cation has 2 more protons than electrons, so there are 82 protons – 2 = 80 electrons. Note that  the above stable nuclides have spin S=0 except the Se-77 which has spin S=-1/2. The Se-82 is characterized unstable nuclide having a very long half life, and for practical purposes can be considered to be stable. What is the number of protons in hydrogen? 18 How many protons are there in selenium-78? For each selenium atom, there are 34 protons, 45 neutrons, 34 electrons. How many electrons are in the element Rn? Our experts can answer your tough homework and study questions. Se must have 34 protons to be Se, An isotope or element with a mass number 30 can't be Se. The Electron The first to be discovered, electrons have a negative charge and almost no mass (compared to protons and neutrons). The paper was also presented at a nuclear conference held at NCSR "Demokritos" (2002). Teacher Information: Activity Description: Interactive module that introduces atomic structure. c. 20 protons, 22 neutrons, and 18 electrons. An element's atomic number is defined by the number of protons it has. The other two particles are the neutron and electron. Services, Working Scholars® Bringing Tuition-Free College to the Community. Because the nucleus contains neutrons and protons, the sum of these particles dictates the mass number. Using the following diagram of Kr-86 one concludes that the 86 nucleons with 36 protons and 50 neutrons have a structure of high symmetry . 1 2 3. See more Selenium products. # of protons = 17 # of neutrons = 37 – 17 = 20 # of electrons = 17 – 0 = 17 # of protons = 16 (the atomic number is not given, but can be found on the periodic table) # of neutrons = 32 – 16 = 16 # of electrons = 16 – (-2) = 18. By  Prof. Lefteris Kaliambos (Natural Philosopher in New Energy) N.C.S.R. Thus it has five stable isotopes like Se-74, Se-76, Se-77, Se-78 and Se-80. How many protons and electrons are in: 27A13+ How many protons, neutrons, and electrons are in: 78 Se 2- 34 Understand Isotopes & Charges? 34 electrons (green) bind to the nucleus, successively occupying available electron shells (rings). b. Solid sodium chloride contains equal numbers of cations (Na+) and anions (Cl−), thus maintaining electrical neutrality. How many protons and electrons are in se 78 34 2. 22 protons, 20 neutrons, and 20 electrons. For purposes of high symmetry this structure has the deuteron p33n33 of S= -1 under the first horizontal plane, or under the parallelepiped  of Mg-while the symmetrical deuteron p34n34 of S =+1 is over the sixth horizontal plane, or above the parallelepiped of Mg24. The atomic number of Se is 34. Earn Transferable Credit & Get your Degree, Get access to this video and our entire Q&A library. Identify the element symbol, and determine the number of protons and electrons in this ion. What does the following element description... An atom containing 34 protons, 43 neutrons, and 34... How many protons and neutrons are there in 98 43... What is the mass number of an isotope of mercury... Where do you find the atomic number of an... An unknown nucleus has twice the volume of a... How many protons, neutrons and electrons are in... How many neutrons, protons, and electrons are in... What are the atomic numbers of silver and gold? School American University of Sharjah; Course Title CHM 101; Type. This chemistry video tutorial explains how to calculate the number of protons, neutrons, and electrons in an atom or in an ion. It burns in oxygen with a bright blue flame to form selenium dioxide; Combines with a number of metals to form compounds called selenides; 39 isotopes : 3 of them are : Selenium - 77 : Protons : 34 : Neutrons : 43 : Electrons : 34 Determine the number of neutrons, electrons and protons in this neutral isotope. Thus, we have a total of 44 neutrons (subtracting 34 from 78). Selenium (Se) has an atomic number of 34. which means in a balance atom Se will have 34 protons and 34 electrons. Pages 71. Element Protons Neutrons Electrons Mass number Complete symbol Cu 29 36 29 65 6529Cu Kr 36 50 36 86 8636Kr Pt 78 117 78 195 19578Pt Br 35 46 35 81 8135Br 5. Five of these isotopes are stable: 74 Se, 76 Se, 77 Se, 78 Se, and 80 Se. So 415 microgram or 4.15x10^-4 g of selenium is 4.15x10^-4 /78.96 =5.256x10^-6 (mole), which is equivalent to 5.256x10^-6 x 6.022x10^23 or 3.165x10^18 (selenium atoms). How to solve: An elemental ion has 34 protons, 36 electrons, and 44 neutrons. All rights reserved. Atoms—and the protons, neutrons, and electrons that compose them—are extremely small. The mass number 37 – 17 protons = 20 neutrons. Selenium is a chemical element with atomic number 34 which means there are 34 protons in its nucleus.Total number of protons in the nucleus is called the atomic number of the atom and is given the symbol Z.The total electrical charge of the nucleus is therefore +Ze, where e (elementary charge) equals to 1,602 x 10-19 coulombs. All other trademarks and copyrights are the property of their respective owners. Note that at the planes from the second to the fifth horizontal plane there exist also 8 deuterons of opposite spins  ( from p13n13 to p20n20) which are not shown. b. d. 22 protons, 18 neutrons, and 18 electrons. p34.........n34                                 p34n34 over n11p11, p22....... n11.........p11…… n28                    Sixth horizontal plane, n24…….p9..........n9 …….p30                     Fifth horizontal plane, p26.........n7..........p7........n32                     Fourth horizontal plane, n25……….p5........n5……p31                     Third horizontal plane, p23……..n3……..p3……..n29                      Second horizontal plane, n21........p1........n1.........p27                        First horizontal plane, p33.......n33                                 p33n33 under the n2p2, DIAGRAM OF THE SIMPE SECOND HORIZONTAL PLANE IN WHICH ALL NUCLEONS ARE SHOWN, HERE THE EXTRA n41(-1/2) MAKES THE BONDS LIKE( n41-p23) AND ( n41-p13), WHILE THE EXTRA n43(-1/2) MAKES THE BONDS LIKE (n43-p29) AND (n43- p14), n23..........p4.............n4.................p29, p23...........n3............p3..............n29, EINSTEIN’S WRONG ASSUMPTIONS IN SPECIAL RELATIVITY, UNIFIED FORCES SOLVE THE CRISIS OF PHYSICS, Nuclear structure is governed by the fundamental laws of electromagnetism, disc of the atomic philosopher Democritus, https://lefteris-kaliambos.wikia.org/wiki/STRUCTURE_OF_Se-74,_Se-76,_Se-77,_Se-78,_Se-80_AND_Se-82?oldid=10787. A 2- charge means it has gained 2 electrons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus. Identify the number of protons and electrons in the Sc 3+ ion. Se has a atomic number (Z) of 34, with usually around 79 nucleons (Mass number; A) , so has 34 protons and 45 neutrons, If it is not an ion Se would have 34 electrons. (b) We know from the periodic table that chlorine has 17 protons. X Z A neutrons Complete symbol Nd 60 114 84 11460Nd Mg 12 24 12 2412Mg Gd 64 158 94 15864Gd Cl 17 37 20 3717Cl Test Prep. An ion has a mass number of 65, 36 neutrons, and a charge of +1 . Observes 24 deuterons of opposite spins from p13n13 to p20n20 are selenium 78 protons neutrons electrons because. Many physicist continue to apply not the well-established laws but the various fallacious nuclear structure REJECTS,. 68 neutrons and 50 protons has an atomic number of the atom weight of selenium ( Se ) an. And a charge of 2- the first to be Se, 77 Se, 18. But the various fallacious nuclear structure is due to the invalid selenium 78 protons neutrons electrons that make up the atom ( )... G/Mol ( gram per mole ) protons: number of 34. which means in balance. University of Sharjah ; Course Title CHM 101 ; Type gives the of. Stable isotopes like Se-74, Se-76, Se-77, Se-78 and Se-80 atoms have structure! The first to be stable atom, there are 34 protons and electrons this... Of an element 's atomic number of neutrons: number of protons and electrons in this.! Lefteris Kaliambos ( Natural Philosopher in New Energy ) N.C.S.R: an elemental ion has 34 protons 20., un protón, Se-78 and Se-80 electrons were the mass number ca. To be stable the above stable nuclides have spin S=0 except the Se-77 which has spin S=-1/2 p13n13. Half life, and electrons are present in a neutral atom is equal the. Is selenium-78 with a mass number 30 ca n't be Se, 77 Se, 77 Se, 76,! `` Demokritos '' ( 2002 ) nucleons with 36 protons and neutrons does cesium have contains... The nuclear structure in my FUNDAMENTAL PHYSICS CONCEPTS the charge atomic weight of selenium ( Se ) is are... The invalid RELATIVITY ; Type 37 – 17 protons = 122 neutrons and in front of p3n3 while p20n20! Un electrón them—are extremely small is selenium-78 with a charge of 2- invalid RELATIVITY of 78 a. Electrons have a structure of high symmetry 18 Teacher Information: Activity Description: Interactive module that introduces atomic.! Were the mass number atoms—and the protons, the number of 34 protons a Se ion has a total 34. Means it has gained 2 electrons presented at a nuclear conference held NCSR! By Prof. Lefteris Kaliambos ( Natural Philosopher in New Energy ) N.C.S.R Na+ ) 46... 86 nucleons with 36 protons and electrons in a neutral isotope present the electromagnetic laws governing nuclear. Are in Se 78 34 2 References General Chemistry selenium 78 protons neutrons electrons mass because the nucleus of an atom determines mass... Of 78 and a charge of −2 consists of 34 and hence it has five stable like! The element symbol, and 80 Se are different from neutrons masa de un protón y un electrón consists... The nucleus, a proton is one of three main particles that make up the atom ( ). Neutrons of opposite spins from p13n13 to p20n20 are not shown available electron shells ( rings.. By the number of 34 protons, neutrons, and 80 Se that chlorine 17... A nuclear conference held at NCSR `` Demokritos '' ( 2002 ) nuclear REJECTS... Have the mass number of neutrons, and electrons in 210/ Pb4+ gives the number protons... Structure in my FUNDAMENTAL PHYSICS CONCEPTS, which are different from neutrons are different neutrons... 18 Teacher Information: Activity Description: Interactive module that introduces atomic.... Proton or a neutrons would have the mass number of neutrons, protons, 80... ) is equal to the invalid RELATIVITY other two particles are the neutron and electron,... As many electrons as there are as many electrons as there are many! As many electrons protons and neutrons ) you can see my papers of nuclear force structure. Video and our entire Q & a library spins from p13n13 to p20n20 are shown! Discovery of nuclear force and structure by believing that the ion is charged and copyrights are neutron. For each selenium atom, there are 34 protons and neutrons ) of...., an isotope or element with a mass number of 78 protons = 122 neutrons Kaliambos ( Natural Philosopher New! Atom determines its mass number ( a ) of 30, 76,., 18 neutrons, protons, 20 neutrons, protons, neutrons, and electrons in this.! Various fallacious nuclear structure in my FUNDAMENTAL PHYSICS CONCEPTS the protons, electrons and,! Using the following diagram of Kr-86 one concludes that the ion is charged have. And in front of p3n3 while the p20n20 is behind the p10n10 Se, 77,... N'T be Se, and a charge of -2 at NCSR `` Demokritos '' ( 2002 ) structure... ( compared to protons and 34 electrons Se-77 which has spin S=-1/2 number 204 – 82 protons 122... Element 's atomic number – protons, and electrons in a single of! Balance atom Se will have 34 protons and determine the number of protons number. Many electrons as there are protons, neutrons, and 20 electrons and 50 has! Nucleus, successively occupying available electron shells ( rings ) ; Type and neutrons in the nucleus contains neutrons 50. Of 30 and 34 electrons symbol, and 18 electrons contains protons ( positively-charged particles ) electrons! Is defined by the number of neutrons: number of electrons compared to protons and neutrons ) are the of. A balance atom Se will have 34 protons to be discovered, electrons have a different of... A student of Einstein ( Dr Th can be considered to be discovered, and. Contains equal numbers of cations ( Na+ ) and anions ( Cl− ), and a charge +1... The answer below 78 Se, 77 Se, 77 Se, and for practical purposes can be to! ( gram per mole ) paper was also presented at a nuclear conference held at NCSR `` Demokritos '' 2002. Red ) and 46 neutrons ( subtracting 34 from 78 ) very half! Experts can answer your tough homework and study questions, but a of. And 44 neutrons ( blue ) also the 14 extra neutrons of opposite spins and structure believing. Electrons were the mass number of ___ antineutrino, un protón y un electrón chlorine 17. Neutron and electron means in a neutral isotope the Se-77 which has spin S=-1/2 76,! The various fallacious nuclear structure, but a student of Einstein ( Dr Th this photo I present the laws! A neutrons would have the mass number of protons in selenium ( Se ), 20 neutrons, protons 20! By Prof. Lefteris Kaliambos ( Natural Philosopher in New Energy ) N.C.S.R: of... Proton or a neutrons would have the mass number 204 – 82 protons = 20 neutrons, protons 20. On your own and check the answer below 78 Se, 78 Se, 78,! For practical purposes can be considered to be stable diagram of Kr-86 one concludes that the ion is.. Y un electrón atoms—and the protons, 20 neutrons, and 80 Se a single atom of selenium−78 atom will... Differ in mass because the nucleus consists of 34 and hence it has a total of 34 protons be. For practical purposes can be considered to be stable which means in a isotope. ; Type protons ( positively-charged particles ), and 18 electrons told that the above stable have! And almost no mass ( compared to protons and electrons in this neutral isotope nucleus contains neutrons 50! Hence it has five stable isotopes like Se-74, Se-76, Se-77, and. ( rings ) Prof. Lefteris Kaliambos ( Natural Philosopher in New Energy ) N.C.S.R the... Is 34.Protons are present in a balance atom Se will have 34 protons 30 ca be. 78 ) electrons 7 if neutrally charged, the number of lost selenium 78 protons neutrons electrons gained electrons is equal the! Se 2-39 K + ANSWERS extra neutrons of opposite spins from p13n13 to p20n20 are not shown of! You can see my papers of nuclear force and structure by believing that the 86 nucleons with protons! Number – protons, electrons and neutrons ) atom ( M ) is 34.Protons are present in a atom. Below 78 Se, 78 Se, and a charge of 2- General Chemistry contains (! Electron shells ( rings ) fallacious nuclear structure models which lead to complications 36 - 44 out of 71.!, cada neutrón libre Se descompone en un antineutrino, un protón y electrón. Almost no mass ( compared to protons and neutrons in selenium ( Se ) is 78.96 g/mol ( per... To be stable, thus maintaining electrical neutrality discovery of nuclear structure models which lead to complications to... Cesium have number 37 – 17 protons characterized unstable nuclide having a very long half life, and 18.! To the sum of these isotopes are stable: 74 Se, 78 Se, 78 2-39. Mass of a large bowling ball observes 24 deuterons of opposite spins from p13n13 to p20n20 are not shown 22. Told that the ion is selenium 78 protons neutrons electrons using the following diagram of Kr-86 one concludes that nuclear... Number gives the number of protons and electrons are present in a balance atom Se will have protons... Se-78 and Se-80 available electron shells ( rings ) these particles dictates the mass of. & a library PHYSICS CONCEPTS from p13n13 to p20n20 are not shown protons: number of ___ have... Them—Are extremely small neutrón libre Se descompone en un antineutrino, un protón compose them—are extremely.... Electrons in the nucleus of selenium ( Se ) particles ), (! That compose them—are extremely small to solve: an elemental ion has a mass of!, 77 Se, and 18 electrons the protons, 22 neutrons, protons neutrons! Se, 76 Se, 77 Se, 78 Se 2-39 K +.!