Week 10 Quiz: Molecular Geometry and Polarity

According to the octet rule most elements need _______ valence electrons.

• 2
• 8
• 6
• 18

Tags

NGSS.HS-PS1-1

Choose the correct shape for this molecule:

• Trigonal planar
• Trigonal pyramidal
• Tetrahedral
• Linear

Choose the correct shape for this molecule:

• Trigonal planar
• Trigonal pyramidal
• Bent
• Linear

Choose the correct shape for this molecule:

• linear
• Trigonal pyramidal
• Bent
• Tetrahedral

Is this molecule ionic, polar covalent or purely covalent

• ionic

• polar covalent

• purely covalent

What molecule could this be? (Each purple cloud represents a lone pair of electrons. Hint: Drawing lewis structures for the choices will help you answer this question.)

• CO₂

• NH₃

• H₂S

• CH₄

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following bonds is least polar?

• C--O

• O--H

• S--Cl

• Br--Br

• I--F

Is this molecule polar or non-polar?

• Polar

• Non-polar

Is this molecule likely to dissolve in water? CCl₄

• Yes

• No

Is this molecule polar or nonpolar?

• Polar

• Nonpolar