1. Locate in the periodic table the element that has the last 4d electron.
A. Ar B. Cd C. K D. Mo
2. Which of the following electrons is degenerate (having the same energy) with an electron with quantum numbers n = 4, l = 2, m = -1, s = ½?
A. n = 5, l = 1, m = -1, s = ½
B. n = 6, l = 0, m = 0, s = - ½
C. n = 4, l = 2, m = 2, s = - ½
D. n = 4, l = 3, m = -1, s = ½
3. What is the maximum number of electrons that are permitted in a d subshell?
A. 2 B. 3 C. 6 D. 10
4. How many orbitals are there in a 3p subshell?
A. 10 B. 3 C. 18 D. 5
5. What values of ml are permitted for an electron with l = 4?
A. -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5
B. -4, -3, -2, -1, 0, 1, 2, 3, 4
C. 0, 1, 2, 3, 4
D. 0, 1, 2, 3, 4, 5
6. What is the electronic configuration of sulfur?
A. 1s²2s²2p²3s²3p⁴
B. 1s²2s²2p⁴
C. 1s²2s²2p⁶3s²3p²
D. 1s²2s²2p⁶3s²3p⁴
7. Locate in the periodic table the first element that has the first 4d electron.
A. Sc B. La C. Ga D. Y
8. What is the abbreviated electronic configuration for Sr?
A. [Kr] 5s¹ B. [Rn] 7s¹ C. [Kr] 5s² D. [Rb] 5s²
9. What values of l are permitted for an electron with n = 5?
A. 1, 2, 3, 4 B. 0, 1, 2, 3 C. 0, 1, 2, 3, 4 D. 0, 1, 2, 3, 4, 5
10. Assuming that the atom is neutral, identify the element with the electronic structure 1s²2s²2p⁶3s²3p¹.
A. Al B. N C. Si D. Mg
11. Which of the following electrons, identified only by their n and l quantum numbers, has the lowest energy?
A. n = 2, l = 1 B. n = 3, l = 0 C. n = 3, l = 1 D. n = 3, l = 2
12. Which of the following sets of quantum numbers is not permitted? (You can have more than 1 answer.)
A. n = 3, l = 2, m = -1, s = - ½
B. n = 1, l = 0, m = 1, s = ½
C. n = 3, l = 0, m = 0, s = - ½
D. n = 3, l = 1, m = 2, s = ½