Topic 3

Question 1

How is number of electron pairs worked out?

Answer 1

Number of outer electrons on central atom + number of bonded atoms/ 2

Question 2

What is the electron arrangement of an atom with 2 electron pairs?

Answer 2

Linear

Question 3

What is the electron arrangement of an atom with 3 electron pairs?

Answer 3

Trigonal planar

Question 4

What is the shape of an atom with 4 electron pairs and 4 bonding pairs?

Answer 4

Tetrahedral

Question 5

What is the shape of an atom with 4electron pairs and 3 bonding pairs and 1 non-bonding pair?

Answer 5

Trigonal pyramidal

Question 6

What is the shape of an atom with 4 electron pairs and 2 bonding pairs and 2 non-bonding pairs?

Answer 6

Bent

Question 7

What is the shape of an atom with 5 electron pairs?

Answer 7

Trigonal bipyramidal

Question 8

What is the shape of an atom with 6 electron pairs and 6 bonding pairs?

Answer 8

Octahedral

Question 9

What is the shape of an atom with 4 electron pairs and 4 bonding pairs and 2 non-bonding pairs?

Answer 9

Square planar