Section 3: Bonding - Covalent Bonding

Question 1

In which incident does a covalent bond form?

Answer 1

If two elements have a small difference in electronegativity then a covalent bond will form

Question 2

What happens in a covalent bond?

Answer 2

In a covalent bond two or more atoms share electrons to complete their outer shells , they are able to share electrons as the postive nucleus in each atom attracts the negative electron of the other atom that is being shared in the pair

Question 3

What happens in a double bond?

Answer 3

In a double bond two atoms share two pairs of electrons.

Question 4

What is a simple covalent compound?

Answer 4

A simple covalent compound is made up of lots of individual covalent molecules . In each covalent molecules there are covalent bonds but between covalent molecules there are intermolecular forces and not covalent bonds. Intermolecular forces are much weaker than covalent bonds.

Question 5

Why does a simple covalent compound have low melting and boiling points?

Answer 5

A simple covalent compound has low melting and boiling points because it is held together by intermolecular forces which are weak and thus take little energy to overcome.

Question 6

What is a giant covalent structure (macromolecular structure) ?

Answer 6

A macromolecular structure is a network of atoms each bonded covalently to one another.

Question 7

Name two macromolecular structures

Answer 7

Graphite

Diamond

Question 8

What is another way that coordinate bonding can be referred to as?

Answer 8

Dative covalent bonding

Question 9

What happens in a dative covalent bond?

Answer 9

In a dative covalent bond one atom donate both electrons to the bonding pair.

Question 10

On a diagram how would a covalent bond be shown?

Answer 10

A dative covalent bond could be shown in a digram by an arrow pointing away from the donor atom.