Shapes of molecules

Question 1

What is the shape and the angle of a Linear molecule

Answer 1

2 electron pairs on a central atom

180°

Question 2

What is the shape and the angle of a Trigonal Planar molecule

Answer 2

3 electron pairs on a central atom

120°

Question 3

What is the shape and the angle of a tetrahedral molecule

Answer 3

4 electron pairs on a central atom

109.5°

Question 4

What is the shape and the angle of a trigonal bipyramidal molecule

Answer 4

5 electron pairs on a central atom, uses d orbital to have 10 electrons
120° & 90°

Question 5

What is the shape and the angle of a octahedral molecule

Answer 5

6 electron pairs on a central atom, uses d orbital to have 12 electrons
90°

Question 6

What happens if there is a lone pair of electrons

Answer 6

When there is a lone pair of electrons they the repel the bonding pairs as they are held closer to the nucleus

Question 7

What is the shape and the angle of a pyramidal moleule

Answer 7

3 pairs of electrons ands one lone pair on central atom

107°

Question 8

What is the shape and the angle of a bent molecule

Answer 8

2 pairs of electrons and 2 lone pairs on central atom

104.5°

Question 9

What do you do if there is multiple bonds

Answer 9

treat then just like single bonds

Question 10

Order of repel of electrons

Answer 10

Single bond < Double bond < Triple bond < Lone pair

Question 11

How to show if the atom is behind planar or infront

Answer 11

Dotted line - Behind planar

Wedge line - Infront planar

Question 12

What is the strongest type of intermolecular force

Answer 12

Hydrogen bonding. permanent dipole to permanent dipole attraction and occurs with highly electronegative element such as nitrogen, oxygen or fluorine. and hydrogen about to lose proton that polarised