Lecture 4

Question 1

Chemical bond

Answer 1

The attractive force that holds the atoms together.

Question 2

Ionic bonding

Answer 2

A type of bonding where atoms lose or gain electrons. Eg NaCl, sodium chloride

Question 3

Covalent bonding

Answer 3

A type of bonding where atoms share electrons. Eg. Water

2 types:
Non-polar/Pure covalent - equal sharing of electrons.

Polar covalent - unequal sharing of electrons.

Question 4

Electronegativity

Answer 4

A measure of the tendency of an atom to attract a bonding pair of electrons.

Less than 0.2 is pure covalent.

0.2 to 1.6 is polar covalent.

Greater than 2.0 is ionic.

1.6 - 2.0
Contains a metal = ionic.
Non metals only = polar covalent.