A. 1s3, B.1s2, 2s1, C. 1s2, 2p1, D. 1s1 2p1 3s1
2-4-2. In a typical atom, which of these orbitals is filled last?
A. 3p, B. 3d, C. 4s, D. 4p
2-4-3. Which of the following is the ground state electron configuration of Sulfur?
A. 1s2 2s2 2p6 2d6
B. 1s2 2s2 2p6 3s2 3p4
C. 1s2 2s2 2p7 3s1 3p3
D. 1s2 2s2 2p6 3s2 3p6
2-4-4. Which of the following is the ground state electron configuration of Al?
A. [Ne] 3s2 3p1
B. [He] 2s2 2p6 3s2 3p1
C. [Mg] 3p1
D. all of the above
2-4-5. How many electrons are unpaired in the ground state of Oxygen?
A. 0, B. 1, C. 2, D. 3
2-4-6. Which of the following atoms is not paramagnetic?
A. Na, B. Mg, C. C, D. Ti
2-4-JJW-1. What is the ground state electron configuration of Se2-?
2-4-JJW-2. What is the ground state electron configuration for zirconium?
2-4-ALD. Choose the electron configuration that corresponds to an excited state for the K atom.
A. 1s2 2s2 2p6 3s2 3p6 3d1
B. 1s2 2s2 2p6 3s2 3p6 4s1
C. 1s2 2s2 2p6 3s2 3p6
D. None of the above
2-4-CML. Which is the excited electron configuration for strontium?