2.1 spdf electron configuration

Electrons are filled according to 3 principles. Which is FALSE ?

• Aufbau principle
• Hund's rule
• Pauli exclusion principle
• spdf principle

Electrons occupy orbital singly before pairing up. State that principle/rule.

• Aufbau principle
• Hund rule
• Pauli exclusion principle
• spdf principle

2^nd energy level contain 2 sublevel. Name the sublevel and max number of electron in each sublevel.

• 1s with 1 electron and 1p with 3 electrons
• 2s with 1 electron and 2p with 3 electrons
• 1s with 1 electron and 1p with 6 electrons
• 2s with 2 electrons and 2p with 6 electrons

Write the full electronic structure for Na with 11 electrons.

• 1s²2s²2p⁶3s¹
• 1s²2s²3p⁶3s¹
• [Ne]3s¹
• 1s²2s²2p⁶3p¹

Tags

NGSS.HS-PS1-1

Write the full electronic structure for Ca with 20 electrons.

• 1s²2s²2p⁶3s²3p⁶
• 1s²2s²2p⁶3s²3p⁶4s⁰
• 1s²2s²2p⁶3s²3p⁶4s¹
• 1s²2s²2p⁶3s²3p⁶4s²

Tags

NGSS.HS-PS1-1

Write the full electronic structure for Sc with 21 electrons.

• 1s²2s²2p⁶3s²3p⁶3d³
• 1s²2s²2p⁶3s²3p⁶3d¹4s²
• 1s²2s²2p⁶3s²3p⁶4s²4d¹
• 1s²2s²2p⁶3s²3p⁶4s²3d¹

Tags

NGSS.HS-PS1-1

Write the full electronic structure for Cr with 24 electrons.

• 1s²2s²2p⁶3s²3p⁶3d⁶
• 1s²2s²2p⁶3s²3p⁶4s²4p⁴
• 1s²2s²2p⁶3s²3p⁶4s²3d⁴
• 1s²2s²2p⁶3s²3p⁶4s¹3d⁵

Write the full electronic structure for Cu with 29 electrons.

• 1s²2s²2p⁶3s²3p⁶3d¹⁰4s¹
• 1s²2s²2p⁶3s²3p⁶3d⁹4s²
• 1s²2s²2p⁶3s²3p⁶4s²3d⁹
• 1s²2s²2p⁶3s²3p⁶4s¹3d¹⁰

Write the electronic structure for Cr³⁺ ion

• [Ar]4s¹3d⁵
• [Ar]4s¹3d²
• [Ar]4s⁰3d³
• [Ar]3d³

Write the electronic structure for Mn⁴⁺ ion

• [Ar]4s²3d⁵
• [Ar]4s²3d¹
• [Ar]4s⁰3d²
• [Ar]3d³