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1. Chromium has an atomic number of 24 and an
atomic weight of 51.996. How many neutrons would you expect to find
in the most common isotope of chromium? 2. An element has an atomic number of 10 and
atomic weight of 20. What is its chemical name? 3. How many protons and how many neutrons are
there in the isotope 79Au197? 4. Suppose you could add a neutron to the isotope
of boron, 5B11. What would you get? 5. Suppose you could add a proton to the isotope
of boron, 5B11. What would you get? 6. If the isotope of beryllium, 84Po213,
emits an alpha particle what is the daughter product? 7. Suppose that you have 1000 atoms of a radioactive
substance with a half-live of 3 hours. How many atoms of that element would
remain after 6 hours? 8. How many atoms from the original 1000 atoms
in Problem 7 would remain after 9 hours? 9. How many half-lives must pass for the number
of atoms of a given radioactive isotope to drop to one fourth of the original
number? 10. How many half-lives must pass for the number
of atoms of a given radioactive isotope to drop to one eighth of the original
number. |
Answer
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