2.2.1 [Bonding in discrete molecules]

Question 1

What is a discrete molecule?

Answer 1

A discrete molecule is an electrically neutral group of 2 or more atoms held together by chemical bonds.

Question 2

How can covalent and polar bonding in discrete molecules be represented?

Answer 2

Dot and cross diagram?

Question 3

What is the octet rule?

Answer 3

Usually in order to form a stable compound, the outer shell of each atom must have the same number of electrons as the outer shell of a noble gas. Most cases this is 8 electrons. Led to a rule often called the octet rule. In some cases the outer shell of the central atom of the molecule does not contain 8 electrons.

Question 4

What is displayed formula?

Answer 4

Shows each bonding pair as a line drawn between the 2 atoms involved. Shown by an arrow on a dative bond for the lone pair of electrons forming a covalent bond.