pg 227-229

Question 1

what are the main assumptions of vespr theory

Answer 1

the atoms in a molecule are held together by pairs of electrons known as bonding pairs
some atoms in a molecule may have pairs of electrons not involved in bonding known as lone pairs
the electrons are negative so repel as far as possible from each other

Question 2

what do the letters in the general formula AXn stand for

Answer 2

A central atom

X atoms around it of n number

Question 3

what is the first step in working out the shape of a molecule

Answer 3

identifying the central atom

Question 4

what shape is two bonding pairs

Answer 4

linear

Question 5

what shape is three bonding pairs

Answer 5

trigonal planar

Question 6

what shape is four bonding pairs

Answer 6

tetrahedral

Question 7

what shape is five bonding pairs

Answer 7

trigonal bipyramidal

Question 8

what shape is six bonding pairs

Answer 8

octahedral

Question 9

what shape is seven bonding pairs

Answer 9

pentagonal bipyramidal

Question 10

bond angles for linear

Answer 10

180

Question 11

bond angles for trigonal planar

Answer 11

120

Question 12

bond angles for tetrahedral

Answer 12

109.5

Question 13

bond angles for trigonal bipyramidal

Answer 13

120 and 90

Question 14

bond angles for octahedral

Answer 14

90

Question 15

bond angles for pentagonal bipyramidal

Answer 15

72 and 90

Question 16

what is three bonding pairs one lone pair shape

Answer 16

trigonal pyramidal

Question 17

what is the bond angle for trigonal pyramidal

Answer 17

106.7