4. Chemical bonding

Question 1

What is a noble gas?

Answer 1

A noble gas has full valence electron shell therefore they are chemically unreactive

Question 2

What happens to an atom do not have full valence shells?

Answer 2

They can complete their valence shell through loss electrons, gain of electrons or sharing electrons

Question 3

What are cations?

Answer 3

A cations is a positive ion they have more protons than electrons and have a net positive charge

Question 4

What are anions?

Answer 4

Anions are negative ions that have a net negative charge and usually have a noble gas electronic configuration

Question 5

The ionic bond

Answer 5

An ionic bond is the mutual electrostatic attraction between ions of opposite charge

Question 6

Ionic compounds

Answer 6

An ionic compound is a neutral substance made up of ions of opposite charges. These ions are held together by ionic bonds

Question 7

Ionic structure

Answer 7

An ionic compound forms a structure called a giant ionic crystal lattice

Question 8

What is valency?

Answer 8

Valency refers to the number of electron(s) that must be lost, gained, or shared in order for the atom to attain a noble gas electronic configuration

Question 9

Covalent molecules

Answer 9

A covalent molecule can be made from atoms of the same or different elements

Question 10

What are covalent molecules?

Answer 10

Covalent molecules are simple molecules. They have a countable number of atoms in a fixed ratio.