1. a. Write the electron configuration of Osmium (Os).

b. Name the element with the electron configuration [Kr]5s²4d¹⁰5p².

c. Write a set of quantum numbers that could describe a 5d electron.

d. Write a set of quantum numbers that could describe a 3p electron.

2. a. Write the electron configuration of Arsenic (As).

b. Write a set of quantum numbers that could describe a 4f electron.

c. Name the element with the electron configuration [Kr]5s²4d⁷.

d. Draw the d_xy orbital. Label axes.

3. The electron configuration of Hafnium (Hf) is?

4. In each pair, choose the element or ion that has the greater electron affinity.

Oxygen or Sulfur

Br or At

5. In each pair, choose the element or ion that has the smaller atomic radius.

Potassium or Zinc

Al or Al³⁺

6. In each pair, choose the element or ion that has the larger ionization potential.

H or He

Nitrogen or Oxygen

7. A d electron can be described by the following quantum numbers:

8. Choose the element or ion in each pair that has the greater electron affinity.

a. Iodine or Chlorine

b. Al or P

9. Choose the element or ion in each pair that has the larger radius.

a. Oxygen or Selenium

b. Sc or Zn

10. Choose the element or ion in each pair that has the smaller ionization potential.

a. Boron or Neon

b. Ca or Ge