Basic Electron Configurations and Orbital Diagrams

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

Which electron configuration belongs to Cl^-?

• 1s² 2s² 2p⁶ 3s² 3p⁵

• 1s² 2s² 2p⁶ 3s² 3p⁶

• 1s² 2s² 2p⁶ 3s² 3p⁷

• 1s² 2s² 2p⁶ 3s² 3p⁴

Tags

NGSS.HS-PS1-1

This orbital diagram represents:  

• C
• B
• N
• O

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

This orbital diagram represents:  

• C
• B
• N
• O

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is incorrect about this orbital diagram?

• Both arrows in the 2p box should be pointing up.

• There is nothing incorrect with this diagram.

• There should only be 1 arrow in the first 2p box and one in the 2nd 2p box.

• All the arrows should be pointing up.

Tags

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

• quantum rule

What element has this electron configuration?

• hydrogen

• helium

• lithium

• beryllium

Tags

NGSS.HS-PS1-1

What element has this orbital notation?

• lithium

• beryllium

• boron

• carbon

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What element has this electron configuration?

• helium

• lithium

• beryllium

• boron

Tags

NGSS.HS-PS1-1

What element has this electron configuration?

• boron

• carbon

• nitrogen

• oxygen

Tags

NGSS.HS-PS1-1