Understanding Electron Configuration

What is the maximum number of electrons the first shell can hold?

• 2

• 8

• 18

• 10

Which principle states that electrons fill the lowest energy levels first?

• Aufbau principle

• Pauli exclusion principle

• Hund's rule

• Heisenberg uncertainty principle

How many electrons can the p sublevel hold?

• 6

• 2

• 10

• 14

What is the electron configuration of oxygen?

• 1s2 2s2 2p4

• 1s1

• [Ne] 3s1

• 1s2 2s2 2p6

What does the shorthand notation [Ne] 3s1 represent?

• Sodium

• Neon

• Oxygen

• Hydrogen