Ions and electron configuration

What is the electron configuration for this atom?

• 1s²2s²2p⁶
• 1s²2s²2p⁵
• 1s²2s²2p³
• 2s²2p³

Tags

NGSS.HS-PS1-1

What atom matches this electron configuration?
1s²2s²2p⁶3s²

• Neon
• Magnesium
• Aluminum
• Potassium

Tags

NGSS.HS-PS1-1

What is the charge of an atom that has lost one electron?

• -1
• -2
• +1
• +2

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the charge of an atom that has gained one electron?

• -1
• -2
• +1
• +2

Tags

NGSS.HS-PS1-1

What is the electron configuration of sodium?

• 1s²2s²2p⁶3s¹
• [Ne]3s¹
• 1s²2s²2p⁷
• Both A and B are correct

Tags

NGSS.HS-PS1-1

What is the electronic configuration of iron?

• 1s²2s²2p⁶3s²3p⁶4s²3d⁶

• 1s²2s²2p⁶3s²3p⁶3d⁸
• 1s²2p⁶3s²3p⁶4s²3d⁶
• 1s²2s²2p⁶3s²3p⁶4s¹3d⁶

Tags

NGSS.HS-PS1-1

Which is the electron configuration for an oxygen atom?

• 1s²2s²2p⁶3s²3p⁶4s²
• 
  1s²2s²2p⁴

• 1s²2s²2p⁶
• 1s²2s²2p⁶3s²3p⁶

Tags

NGSS.HS-PS1-1

Sodium ionizes to form: Na⁺¹.

How many electrons are in this cation?

• 10

• 11

• 22

• 23

Tags

NGSS.HS-PS1-1

Using the image, how many electrons are in an ion of cesium?

• 54

• 55

• 56

• 133

Tags

NGSS.HS-PS1-1

What electron configuration matches an oxygen ion?

• 1s²2s²2p⁶3s2, 3p⁶4s²3d¹⁰4p⁵
• 1s²2s²2p⁴
• 1s²2s²2p⁶
• 1s²2s²2p⁶3s²3p⁶4s²3d¹

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2