The electron configuration of an atom is 1s²2s²2p⁶.  The number of electrons in the atom is 

• 3

• 6

• 8

• 10

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Electrons occupy orbitals of lowest energy first is part of what electron configuration rule?

• Hund’s Rule

• Aufbau Principle
  

• Pauli Exclusion Principle

What does Pauli exclusion principle state ?

• states that each electron occupies the lowest energy orbital available

• states that -no two electrons in the same orbital can have the same spin

• 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

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

• Neon

• Magnesium

• Aluminum

• Potassium

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the maximum number of electrons that an S orbital can have?

• 1 electron

• 2 electrons

• 3 electrons

• 4 electrons

How many valence electrons are represented here?

• 7

• 5

• 2

• 8

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

How many electrons can the d sublevel(orbital) hold?

• 8

• 10

• 2

• 4

What is this element?

• Argon

• Krypton

• Selenium

• Bromide

Tags

NGSS.HS-PS1-1

How many valence electrons does Chlorine have?

• 5

• 2

• 7

• 5

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following is a p block element?

• Ca
• Ar
• Re
• Au