H CHEM - electron configuration

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

NGSS.HS-PS1-2

How many d orbitals are there in a given sublevel?

• 1
• 3
• 5
• 7

How many p orbitals are there in a sublevel?

• 2
• 1
• 4
• 3

How many electrons can the d sublevel hold?

• 8
• 10
• 2
• 4

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

• Mercury
• Gold
• Platinum
• Thallium

Tags

NGSS.HS-PS1-1

What is the noble gas configuration for Sulfur atom?

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

Tags

NGSS.HS-PS1-1

How many electrons can the first energy level hold?

• 1
• 2
• 8
• 0

How many valence electrons does Chlorine have?

• 5
• 2
• 7
• 5

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