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1. What is the electron configuration for oxygen?
A
1s² 2s² 2p⁴
B
1s² 2s² 2p⁶
C
1s² 2s² 2p³
2. Which principle states that electrons fill the lowest energy orbitals first?
A
Aufbau principle
B
Hund's rule
C
Pauli exclusion principle
3. What is the maximum number of electrons in the third energy level?
A
32
B
8
C
18
4. Which orbital designation has the highest energy level
A
2s
B
4s
C
3d
5. Which element has the electron configuration 1s2 2s2?
A
Hydrogen
B
Boron
C
Carbon
6. What is the electron configuration for a sodium?
A
1s² 2s² 2p⁶
B
1s² 2s² 2p⁶ 3s1
C
1s² 2s² 2p⁶ 3s²
7. What is the shape of the p orbital?
A
Double dumbbell-shaped
B
Dumbbell-shaped
C
Spherical
8. Which rule states that electrons occupy degenerate orbitals singly before pairing up?
A
Pauli exclusion principle
B
Aufbau principle
C
Hund's rule
9. What is the maximum number of electrons in p orbitals?
A
2
B
6
C
10
10. What is the electron configuration of Mg?
A
1s² 2s² 2p⁶
B
1s² 2s² 2p⁶ 3s2
C
1s² 2s² 2p⁵