Electron Configuration

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

• Hund’s Rule

• Aufbau Principle

• Pauli Exclusion Principle

After 3p orbital has been filled with electron, why the electron is added to the 4s orbital instead of 3d orbital?

• difference in shape of orbital

• the first ionisation is increasing across the period

• the first ionisation is decreasing going down the group

• due to orbital energy level

Tags

NGSS.HS-PS1-1

Which element has a configuration of 1s2 2s2 2p6?

• Neon

• Helium

• Argon

• Krypton

Tags

NGSS.HS-PS1-1

How many electrons can the first energy level hold?

• 1

• 2

• 8

• 0

Which element has an electron configuration of 2,8,8

• lead

• fluorine

• neon

• argon

Tags

NGSS.HS-PS1-1

What is the electron configuration of carbon?

• 1s2 2s2 2p2

• 1s2 2s2 2p6

• 1s2 2s2 2p4

• 1s2 2s2 2p3

Tags

NGSS.HS-PS1-1

Which rule states that no two electrons in an atom can have the same set of four quantum numbers?

• Aufbau Principle

• Hund’s Rule

• Pauli Exclusion Principle

• Heisenberg Uncertainty Principle

What is the electron configuration of an oxygen ion with a charge of -2?

• 1s2 2s2 2p4

• 1s2 2s2 2p6

• 1s2 2s2 2p5

• 1s2 2s2 2p3

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which element has the electron configuration 1s2 2s2 2p6 3s2 3p1?

• Aluminum

• Silicon

• Phosphorus

• Sulfur

Tags

NGSS.HS-PS1-1

What is the maximum number of electrons that can occupy a single orbital?

• 1

• 2

• 3

• 4