Shapes of Covalent Molecules - VSEPR Theory

How many atoms must be bonded to a central C or Si atom to form a tetrahedral shaped molecule?

• 2

• 4

• 3

• 1

How many total atoms surround the central atom in a trigonal planar or trigonal pyramidal shape?

• 1

• 2

• 3

• 4

The bonds are "bent"  into a pyramid as a result of  

• electron repulsion

• electron attraction

Which shape has a lone pair of electrons on the central atom?

• Trigonal planar

• Trigonal pyramidal 

What group will the central atom of a bent molecule be found in?

• 17

• 15

• 16

• 14

What is the main difference between bent and linear?

• Bent has lone pairs around the central atom making it repeal and bend downwards. 

• Bent does not have any lone pairs on the central atom. 

How many atoms surround the central atom of a bent molecule?

• 1

• 2

• 3

• 4

CO₂ is linear and H₂O is bent because H₂O

• does have unshared pairs of electrons

• contains oxygen

• does not have unshared pairs of electrons

A molecule that is _____________ will always be linear

• diatomic

• covalent

• ionic

• binary

What is the angle for a linear molecule?

• 180 degree

• 108 degree

• 90 degree