Unit 2 Chemistry Test

This is a correct dot diagram for fluorine (F)

• true
• false

Tags

NGSS.HS-PS1-1

Hydrogen needs _____ electrons in its valence shell to be stable.

• 4
• 6
• 8
• 2

What is the correct Lewis Dot Structure for ammonia NH₃

• 
• 
• 
• 

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

Which is the correct Lewis structure for carbon dioxide?

• 
• 
• 
• 

Tags

NGSS.HS-PS1-1

How many total electrons are participating in bonding in the molecule CH₂O?

• 8

• 4

• 2

• 3

Tags

NGSS.HS-PS1-2

 A lone pair is defined as

• A pair of bonding electrons
• One non-bonding electron
• A pair of non-bonding electrons
• A pair of electrons on the central atom

Choose the correct shape for this molecule:

• Trigonal planar

• Trigonal pyramidal

• Bent

• Tetrahedral

What geometry will this molecular structure have?: PH₃

• bent

• tetrahedral

• trigonal planar

• trigonal pyramidal

Tags

NGSS.HS-PS1-3

What is the molecular shape of H₂S?

• linear

• trigonal planar

• bent

• tetrahedral

A molecule of methane has what shape?

• Tetrahedral
• Triangular
• Pyramidal
• Octahedral