2.2.2 Bonding and Structure

Question 1

Strontium has a high melting point and very good electrical conductivity. Explain these physical properties in terms of bonding and structure. Include labelled diagram

Answer 1

Metallic bonding diagram:
Regular arrangement of labelled + ions
scattering of labelled electrons between other
species
Properties linked to explanation:
- Metallic bond and attraction between the electrons
and the positive ions
- Bonds are strong/require a lot of energy to break
-High melting point,
Delocalised electrons move

Question 2

Ionic Bond Defintion

Answer 2

An electrostatic force of attraction between oppositely charged ions

Question 3

Covalent Bond Definition

Answer 3

An electrostatic force of attraction between nuclei of bonded atoms and shared pair of electrons

Question 4

Give the shape and the angle of molecule with 2 bonded pairs of electrons

Answer 4

Linear
180

Question 5

Give the shape and the angle of molecule with 3 bonded pairs of electrons

Answer 5

Trigonal Planar
120

Question 6

Give the shape and the angle of molecule with 4 bonded pairs of electrons

Answer 6

Tetrahedral
109.5

Question 7

Give the shape and the angle of molecule with 3 bonded pair and 1 lone pairs of electrons

Answer 7

Pyramidal
107

Question 8

Give the shape and the angle of the molecule with 2 bonded pair and 2 lone pairs of electrons

Answer 8

Angular Bent
104.5

Question 9

Give the shape and the angle of molecule with 5 bonded pairs of electrons

Answer 9

Trigonal Bipyramidal
120 +90

Question 10

Give the shape and the angle of molecule with 6 bonded pairs of electrons

Answer 10

Octahedral
90

Question 11

Which element has induced dipole - dipole interactions its solid lattice : Boron, Magnesium, Silicon and Sulfur

Answer 11

Sulfur

Question 12

Name the shape of COCl2 molecule and explain why it has that shape

Answer 12

Trigonal planar
3 bonding regions
Bonded regions repel