1.4 Exam Q

Question 1

dot and cross for

Answer 1

Question 2

Answer 2

Question 3

Answer 3

Question 4

what does an ionic bond comprise of

Answer 4

In an ionic bond, there is an electrostatic attraction between two oppositely charged ions.

In fact, the positive ions and negative ions are arranged so that each positive ion is surrounded by several negative ions and vice versa, to maximise the attractive forces and minimise the repulsive forces.

Question 5

what does a covalent bond comprise of

Answer 5

In a covalent (and coordinate) bond, there is a strong electrostatic attraction between the shared pair of electrons and the nuclei of both atoms. This outweighs the repulsion between the electrons in the shared pair.

Also, both electrons in the bond have opposing spins to minimise this repulsion.

Question 6

Answer 6

Question 7

In an ionic bond

Answer 7

there is an electrostatic attraction between two oppositely charged ions. In fact, the positive ions and negative ions are arranged so that each positive ion is surrounded by several negative ions and vice versa, to maximise the attractive forces and minimise the repulsive forces.

Question 8

In a covalent (and coordinate) bond

Answer 8

there is a strong electrostatic attraction between the shared pair of electrons and the nuclei of both atoms. This outweighs the repulsion between the electrons in the shared pair. Also, both electrons in the bond have opposing spins to minimise this repulsion.

Question 9

Answer 9

Question 10

Answer 10

Question 11

Answer 11

Question 12

Electronegativity

Answer 12

is the ability of an atom to attract the bonding electrons in a covalent bond. It is measured on the Pauling scale. Some values are given below.

Question 13

How iselectronegativity affected by group and period