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90 Electrons. neutrons 2. Yttrium was discovered in 1794. It is one of the elements used in superconductors. How many electrons, neutrons, and protons are in an atom of yttrium-88? 39 Electrons, 50 neutrons, 39 Protons

90 Electrons. neutrons 2. Yttrium was discovered in 1794. It is one of the elements used in superconductors. How many electrons, neutrons, and protons are in an atom of yttrium-88? 39 Electrons, 50 neutrons, 39 Protons

Chemistry: An Atoms First Approach
Chemistry: An Atoms First Approach
2nd Edition
ISBN:9781305079243
Author:Steven S. Zumdahl, Susan A. Zumdahl
Publisher:Steven S. Zumdahl, Susan A. Zumdahl
Chapter5: Stoichiometry
Section: Chapter Questions
Problem 44E: The stable isotopes of iron arc 54Fe, 56Fe, 57Fe, and 58Fe. The mass spectrum of iron looks like the...
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17 Electrons / By 90 18 neutrons, 142 neutrons. Electrons 17 protons protons. 90 2. Yttrium was discovered in 1794. It is one of the elements used in superconductors. How many electrons, neutrons, and protons are in an atom of yttrium-88? 39 Electrons, 50 neutrons, Protons neutrons 15 protons b. phosphorus-32 17 neutrons 28 protons 30 neutrons c. nickel-63 39 3. How many neutrons and protons are there in each of the following nuclides? 77 Protons 6 8 a. carbon-14 d. iridium-192 115 neutrons Protons Percentage 0.350% 2.27% 11.56% 11.55% 56.90% 17.37% 26 Protons e. iron-54 28 neutrons 93 Protons f. neptunium-235 93 neutrons 4. Find the average atomic mass of silver if 51.83% of the silver atoms occurring in nature have mass 106.905 u and 48.17% of the atoms have mass 108.905 u. 5. Find the average atomic mass of krypton if the relative amounts are as follows. Isotopic mass 77.920 u 79.916 u 81.913 u 82.914 u 83.912 u 85.911 u 6. A particular atom of potassium contains 19 protons, 19 electrons, and 20 neutrons. What is the atomic number of this atom? What is its mass number? Write the symbol for this potassium nucleus. 7. How did the discovery of subatomic particles and isotopes affect Dalton's theories?
Transcribed Image Text:17 Electrons / By 90 18 neutrons, 142 neutrons. Electrons 17 protons protons. 90 2. Yttrium was discovered in 1794. It is one of the elements used in superconductors. How many electrons, neutrons, and protons are in an atom of yttrium-88? 39 Electrons, 50 neutrons, Protons neutrons 15 protons b. phosphorus-32 17 neutrons 28 protons 30 neutrons c. nickel-63 39 3. How many neutrons and protons are there in each of the following nuclides? 77 Protons 6 8 a. carbon-14 d. iridium-192 115 neutrons Protons Percentage 0.350% 2.27% 11.56% 11.55% 56.90% 17.37% 26 Protons e. iron-54 28 neutrons 93 Protons f. neptunium-235 93 neutrons 4. Find the average atomic mass of silver if 51.83% of the silver atoms occurring in nature have mass 106.905 u and 48.17% of the atoms have mass 108.905 u. 5. Find the average atomic mass of krypton if the relative amounts are as follows. Isotopic mass 77.920 u 79.916 u 81.913 u 82.914 u 83.912 u 85.911 u 6. A particular atom of potassium contains 19 protons, 19 electrons, and 20 neutrons. What is the atomic number of this atom? What is its mass number? Write the symbol for this potassium nucleus. 7. How did the discovery of subatomic particles and isotopes affect Dalton's theories?
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