Practice Unit 3 (3.7)

According to VSEPR, molecules adjust their shapes to keep which of the following as far away as possible?

• Pairs of valence electrons
• Inner shell electrons
• Mobile Electrons
• Electrons closest to the nucleus

The effect of lone pairs of electrons on molecular geometry is

• to push other atoms closer together because lone pairs are

  localized on only one nucleus, so they spread out more.

• to allow the other atoms to be further apart because lone pairs

  take up less space than bonding pairs.

• to create an aysmmetical distribution of the electrons within

  the atom, thus creating a polar molecule by creating dipoles.

• to help to create resonance structures through the formation of

  pi bonds.

What is the VSEPR theory used to predict?

• Bond Strength
• Polarity
• Molecular Shape
• Electronegativity

What molecule could this be? 

• BF₃
• CH₄
• H₂O
• CO₂

Tags

NGSS.HS-PS1-3

Choose the correct shape for this molecule:

• Trigonal planar
• Trigonal pyramidal
• Tetrahedral
• Linear

What is the the shape of this molecule according to VSPER theory?

• Linear
• Tetrahedral
• Trigonal Planar
• Trigonal pyramidal

Who could this molecule be?

• CH₄
• CO₂
• PCl₅
• BF₃

Tags

NGSS.HS-PS1-3

Who could this be? 

• CO₂
• NH₃
• H₂S
• CH₄

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

Who could this be?

• H₂O
• NH₃
• CO₂
• CH₄

Tags

NGSS.MS-PS1-1

What shape would PH₃ have?

• Trigonal Planar

• Trigonal pyramidal

• Bent

• Linear