Shape

Question 1

Valence Shell Electron Pair Repulsion Theory

Answer 1

Prediction of the shape of a molecule by considering both bonding and non bonding electrons

Question 2

How to determine number of electron pairs?

Answer 2

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

Question 3

Electron pair geometry for x electron pairs

Answer 3

2 - linear
3 - trigonal planar
4 - tetrahedral
5 - trigonal bipyramidal
6 - octahedral

Question 4

Molecule geometry for linear

Answer 4

2 bonding pairs = linear

Question 5

Molecule geometry for trigonal planar

Answer 5

3 bonding pairs = trigonal planar
2 bonding pairs = angular

Question 6

Molecule geometry for tetrahedral

Answer 6

4 bonding pairs = tetrahedral
3 bonding pairs = trigonal pyramidal
2 bonding pairs = angular

Question 7

Molecule geometry for trigonal bipyramidal

Answer 7

5 bonding pairs - trigonal bipyramidal
4 bonding pairs = seesaw
3 bonding pairs = T Shaped
2 bonding pairs = linear

Question 8

Molecule geometry for octahedral

Answer 8

6 bonding pairs - octahedral
5 bonding pairs = square pyramidal
4 bonding pairs = square planar

Question 9

What are more repulsive bonding pairs or non bonding pairs and why

Answer 9

Non bonding pairs since bonding pairs are attracted by two nuclei so they repel less

Question 10

How to work out shape of polyatomic ions?

Answer 10

If charge is positive take 1 away from numerator on electron pair equation, if negative add one to to numerator