Midterm Review Pre-Test (Unit 3, 4)

What element has this electron configuration?
1s² 2s² 2p⁶ 3s²

• Neon
• Magnesium
• Aluminum
• Potassium

Which is the electron configuration for an oxygen?

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

What is this element? 
1s²2s²2p⁶3s²3p⁶
4s²3d¹⁰4p⁶

• Argon
• Krypton
• Selenium
• Bromide

What is the shorthand electron configuration for Sulfur?

• [Ar] 3p⁴
• [He] 3s²3p⁴
• [Ne] 3s²3p⁴
• [Na] 3s²3p³
  

What is the atomic number of this element?

• 17

• 18

• 35

• 35.453

What is the mass number of this atom of Chlorine?

• 17

• 18

• 35

• 35.453

Which element has a positive cation charge?

• Oxygen

• Chlorine

• Sulur

• Lithium

How many valence electrons?

• 2

• 4

• 6

• 8

What group does this element belong to?

• 1A

• 2A

• 7A

• 8A

This is a correct dot diagram for neon (Ne)

• true

• false