Nuclear Chemistry Practice Name: ______

1. How many protons, neutrons and electrons does each symbol represent?

60Cu+ p = _____ n = _____ e = _____

16F2- p = _____ n = _____ e = _____

2. Write the symbol for the element that has:

11 protons, 12 neutrons, and 13 electrons ______

51 protons, 49 neutrons, and 51 electrons ______

3. Silicon exists in nature as silicon-28, silicon-29, and silicon-30. Their percent relative abundance is 92.2%, 4.7%, and 3.1% respectively. What is the relative atomic mass of silicon?

4. The element indium exists naturally as two isotopes indium-113 and indium-115. The relative atomic mass of indium is 114.82 amu. Calculate the percent relative abundance of the two isotopes of indium.

5. Write equations for the decay of each of these elements via α emission:

a. bismuth-209

b. radium-224

6. Write equations for the decay of each of these elements via β- emission:

a. cobalt-60

b. calcium-39

7. Write equations for the decay of each of these elements via β+ emission:

a. copper-64

b. nitrogen-12

8. Write equations for the decay of each of these elements when their nucleus captures an electron:

a. gallium-67

b. potassium-40

9. Fill in the correct symbol to complete each equation.

a. 238 U à ______+ 4He

b. 231Th à ______+ 0e

c. _____ à 20Ne + 0e

d. 53Mn + _____ à 53Cr + _____

e. 226Ra à 222Rn + _____

f. 40K à 40Ca + _____

10. Chromium-48 decays by positron emissions. After 4 half-lives, what fraction of the original sample would remain?

11. The half-life of iodine-125 is 60.0 days. What fraction of iodine-125 would remain after 360 days?

12. Phosphorus-32 is used to treat a certain form of leukemia. Starting with 10.0 mg of phosphorus-32, how many milligrams would be left after 57 days? The half-life of phosphorus-32 is 14.3 days.

13. Write the long-hand electron configurations for the following:

Element / Long-hand Electron Configuration
As
F-
N2+

14. Write the short-hand electron configurations for the following:

Element / Short-hand Electron Configuration
Na
P2-

15. If 2.50 x 10-3 g of lithium reacts with excess chlorine gas, how many grams of lithium chloride will be produced?

16. If 5.00 grams of sodium hydroxide reacts with 5.00 grams of hydrochloric acid, how many grams of water should be produced?