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

• Neon
• Magnesium
• Aluminum
• Potassium

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NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which is the electron configuration for an oxygen atom?

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

Tags

NGSS.HS-PS1-1

How many electrons can the d sublevel hold?

• 8
• 10
• 2
• 4

What is this element? 
1s²2s²2p⁶3s²3p⁶
4s²3d¹⁰4p⁶

• Argon
• Krypton
• Selenium
• Bromide

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What atom matches this electron configuration?

[Xe] 6s² 4f¹⁴ 5d¹⁰

• Mercury

• Gold

• Platinum

• Thallium

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the shorthand electron configuration for Sulfur atom?

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

Tags

NGSS.HS-PS1-1

How many valence electrons does Chlorine have?

• 5
• 2
• 7
• 5

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NGSS.HS-PS1-1

How many valence electrons does phosphorus have?

• 5
• 2
• 8
• 15

Tags

NGSS.HS-PS1-1

Identify the element in Period 5 that has 1 valence electron?

• Rb
• Nb
• Ag
• Sb

Tags

NGSS.HS-PS1-1

What element in Period 4 has 5 valence electrons?

• Zr
• As
• V
• Sb

Tags

NGSS.HS-PS1-1