VSEPR theory

What is the MOLECULAR geometry of the central oxygen?

• Linear
• Trigonal Planar
• Bent
• Tetrahedral

What is the best explanation of VSEPR theory?

• It explains the shapes that electrons make around atoms when they repel
• It explains how many electrons fit into an element's valent shell
• It explains why electrons pair up
• It explains why electrons repel each other

Which molecule would have this molecular geometry?

• BF₃
• CH₄
• PCl₅
• CO₂

Who could this be? 

• CO₂
• NH₃
• H₂S
• CH₄

Who could this be?

• H₂O
• NH₃
• CO₂
• CH₄

Tags

NGSS.MS-PS1-1

What is the molecular shape of a silicon dioxide molecule?

• linear
• trigonal planar
• bent
• tetrahedral

Which one of the following is the correct bond angle between atoms adopting a trigonal planar geometry?

• 180°

• 109.5°

• 90°

• 120°

The atoms in a molecule of water adopt what kind of molecular geometry?

• Linear

• Tetrahedral

• Bent

• Trigonal planar

Ammonia, NH₃, adopts a tetrahedral geometry. However, the non-bonding pair on the central nitrogen atom distorts the bond angle away from the expected 109.5°. Which of the following statements correctly describes how the bond angle is distorted?

• The actual bond angle is reduced: it is less than 109.5°

• The actual bond angle is increased: it is more than 109.5°

 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