Arrangement of Electrons in Atoms

How many total electrons does element 15 have?

• 5
• 2
• 8
• 15

Tags

NGSS.HS-PS1-1

What are Valence electrons defined as ?

• as electrons in the atom's outermost orbitals. 
• as electrons in the atom's innermost orbitals.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following elements has 5 valence electrons?

• boron

• phosphorus

• magnesium

• chlorine

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

• Neon
• Magnesium
• Aluminum
• Potassium

Tags

NGSS.HS-PS1-1

How many p orbitals are there in a sublevel?

• 2
• 1
• 4
• 3

How many d orbitals are there in a given sublevel?

• 1
• 3
• 5
• 7

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

Tags

NGSS.HS-PS1-1

Which is the electron configuration for an oxygen atom?

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

Tags

NGSS.HS-PS1-1

What does Pauli exclusion principle state ?

• states that each electron occupies the lowest energy orbital available
• states that a maximum of two electrons can occupy a single atomic orbital, but if only if the electros have opposite spins
• states that single electrons electrons with the same spin must occupy each-energy orbital before additional electrons with opposite spins can occupy the same orbitals