What is the electron configuration of calcium

• 20

• 2,8,8,2

• 2,8,10

Tags

NGSS.HS-PS1-1

How many electrons can the 2nd shell hold

• 0

• 2

• 4

• 8

How many electrons can the first energy level hold

• 0

• 4

• 8

• 2

What is the electron configuration of oxygen?

• A) 1s^2 2s^2 2p^4

• B) 1s^2 2s^2 2p^6

• C) 1s^2 2s^2 2p^2

• D) 1s^2 2s^2 2p^5

Tags

NGSS.HS-PS1-1

Which element has the electron configuration 1s^2 2s^2 2p^6 3s^2 3p^1?

• A) Magnesium

• B) Aluminum

• C) Silicon

• D) Phosphorus

Tags

NGSS.HS-PS1-1

How many electrons are in the outer shell of chlorine?

• A) 5

• B) 6

• C) 7

• D) 8

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the maximum number of electrons that can occupy the third shell?

• A) 8

• B) 18

• C) 32

• D) 10

Which of the following elements has a full outer electron shell?

• A) Helium

• B) Lithium

• C) Beryllium

• D) Boron

Tags

NGSS.HS-PS1-1

What is the electron configuration of a sodium ion (Na+)?

• A) 1s^2 2s^2 2p^6

• B) 1s^2 2s^2 2p^5

• C) 1s^2 2s^2 2p^6 3s^1

• D) 1s^2 2s^2 2p^6 3s^2

Tags

NGSS.HS-PS1-1

Which principle states that electrons fill the lowest energy orbitals first?

• A) Hund's Rule

• B) Pauli Exclusion Principle

• C) Aufbau Principle

• D) Heisenberg Uncertainty Principle