mitted 130 120 110 100 90 80 70 60 50 • Stable Radioactive 40 30 20 10 10 20 30 40 50 60 70 80 90 100 Number of protons (Z) For heavier nuclei (Z > 40), which of the following describes the relative number of protons and neutrons in the nuclei that exist? they are about equal there are more protons than neutrons there are more neutrons than protons Number of neutrons (N)

mitted 130 120 110 100 90 80 70 60 50 • Stable Radioactive 40 30 20 10 10 20 30 40 50 60 70 80 90 100 Number of protons (Z) For heavier nuclei (Z > 40), which of the following describes the relative number of protons and neutrons in the nuclei that exist? they are about equal there are more protons than neutrons there are more neutrons than protons Number of neutrons (N)

Living By Chemistry: First Edition Textbook

1st Edition

ISBN:9781559539418

Author:Angelica Stacy

Publisher:Angelica Stacy

ChapterU1: Alchemy: Matter, Atomic Structure, And Bonding

SectionU1.14: Isotopia: Stable And Radioactive Isotopes

Problem 13E

See similar textbooks

Similar questions

What is the nuclide symbol for the nucleus that contains 11 protons and 12 neutrons?
2.19 Naturally occurring uranium consists of two isotopes, whose masses and abundances are shown below: Only 235U can be used as fuel in a nuclear reactor, so uramium for use in the nuclear industry must be enriched in this isotope. If a sample of enriched uranium has an atomic weight of 235.684 amu, what percentage of 235LT is present?
Radon is a radioactive gas that can cause lung cancer. It has been detected in the basement of some homes. In an atom of Rn-220, (a) how many protons are there? (b) how many neutrons are there?
In what way are isotopes of a given element always different? In what way(s) are they always the same?
Write the following isotopes in hyphenated form (e.g., carbon-14). (a) N1124a (b) A1329l (c) K3673r (d) I77194r
Neon is an inert gas with three stable isotopes. It is used in gas lasers and in advertising signs. Its isotopes and their abundances are: Ne-20 19.9924 amu 90.51% Ne-21 20.9938 amu 0.27% Ne-22 21.9914 amu 9.22% What is the average atomic mass of neon?
Define the term atomic weight. Why might the values of atomic weights on a planet elsewhere in the universe be different from those on earth?
2.86 For some uses, the relative abundance of isotopes must be manipulated. For example, a medical technique called boron neutron capture therapy needs a higher fraction of 10B than occurs naturally to achieve its best efficiency. What would happen to the atomic weight of a sample of boron that had been enriched in 10B? Explain your answer in terms of the concept of a weighted average.
For each of the isotopes in Exercise 21.1, determine the numbers of protons, neutrons, and electrons in a neutral atom of the isotope.
Though the common isotope of aluminum has a mass number of 27, isotopes of aluminum have been isolated (or prepared in nuclear reactors) with mass numbers of 24, 25, 26, 28, 29, and 30. How many neutrons are present in each of these isotopes? Why are they all considered aluminum atoms, even though they differ greatly in mass? Write the atomic symbol for each isotope.
Bromine has two occuring isotopes: 79Br with atomic mass 78.9183 and 81Br with atomic mass 80.9163. Without using a calculator, what would you estimate the % abundance of Br-79 to be?
How do isotopes of a given element differ? How are they similar?