Unit 2 Review - Electrons

What atom matches this electron configuration?
1s² 2s² 2p⁶ 3s²

• Neon
• Magnesium
• Aluminum
• Potassium

Tags

NGSS.HS-PS1-1

Which is the electron configuration for an oxygen atom?

• 1s²2s²2p⁶3s²3p⁶4s²
• 1s²2s²2p⁴
• 1s²2s²2p⁶
• 1s²2s²2p⁶3s²3p⁶

Tags

NGSS.HS-PS1-1

What is the maximum number of electrons that an orbital can have?

• 1 electron
• 2 electrons
• 3 electrons
• 4 electrons

How many electrons can the 3d sublevel hold?

• 8

• 10

• 2

• 4

What is this element? 
1s²2s²2p⁶3s²3p⁶
4s²3d¹⁰4p⁶

• Argon
• Krypton
• Selenium
• Bromide

Tags

NGSS.HS-PS1-1

How many electrons can the 3p sublevel hold?

• 6

• 10

• 2

• 8

How many electrons can the 4s sublevel hold?

• 8

• 18

• 2

• 8

The impossibility to know simultaneously the exact position and momentum of a particle is called the:

• Einstein Uncertainty Principle
• Moseley Uncertainty Principle
• Heisenburg Uncertainty Principle
• Bohr Uncertainty Principle

An atom that has gained energy beyond normal is said to be ...

• excited

• energized

• naturalized

• grounded

Valence electrons are located...

• inside the nucleus

• in outer space

• on the outermost electron shell in an atom

• on the electron shell closest to the nucleus.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2