Electron Configurations

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

• Neon
• Magnesium
• Aluminum
• Potassium

Which is the electron configuration for an oxygen atom?

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

How many electrons can the d sublevel hold?

• 8
• 10
• 2
• 4

What atom matches this electron configuration?
[Xe] 6s² 4f¹⁴ 5d⁹

• Mercury
• Gold
• Platinum
• Thallium

What is the shorthand electron configuration for Sulfur atom?

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

How many valence electrons does Chlorine have?

• 5
• 2
• 7
• 5

How many valence electrons does phosphorus have?

• 5
• 2
• 8
• 15

What noble gas should be used to write the shorthand configuration for Te?

• Ar
• Kr
• Xe
• Sb

What atom matches this electron configuration?

[Xe] 6s²4f¹⁴5d⁹

• Mercury

• Gold

• Platinum

• Thallium

What is the noble gas configuration for phosphorus?

• [Ar] 3p⁵
• [He] 3s² 3p⁵
• [Ne] 3s² 3p³
• [Na] 3s² 3p⁵