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?   Answer (31.0K)

2. An element has an atomic number of 10 and atomic weight of 20. What is its chemical name?   Answer (31.0K)

3. How many protons and how many neutrons are there in the isotope ₇₉Au¹⁹⁷?   Answer (29.0K)

4. Suppose you could add a neutron to the isotope of boron, ₅B¹¹. What would you get?   Answer (30.0K)

5. Suppose you could add a proton to the isotope of boron, ₅B¹¹. What would you get?   Answer (31.0K)

6. If the isotope of beryllium, ₈₄Po²¹³, emits an alpha particle what is the daughter product?   Answer (33.0K)

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?   Answer (31.0K)

8. How many atoms from the original 1000 atoms in Problem 7 would remain after 9 hours?   Answer (31.0K)

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?   Answer (31.0K)

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 (30.0K)