DE Warm-up: E config & PES

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

• Neon
• Magnesium
• Aluminum
• Potassium

Which is the electron configuration for an oxygen atom?

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

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

• Mercury
• Gold
• Platinum
• Thallium

How many electrons can the first energy level hold?

• 1
• 2
• 8
• 0

How many valence electrons does Chlorine have?

• 5
• 2
• 7
• 5

Which element is pictured?

• neon
• fluorine
• magnesium
• argon

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 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

What does Hund's rule states ?

• 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
• 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

What are the missing pieces?

1s² 2s² 2p⁶ ___ 3p⁶ 4s² ___ 4p²

• 3s² , 4d¹⁰

• 2p⁴ , 3d¹⁰

• 3p⁶ , 3d¹⁰

• 3s² , 3d¹⁰