Chemical Naming and Formulae

Question 1

What is a “compound”?

Answer 1

A compound is a type of pure substance that is formed when two or more chemical elements are chemically bonded together.

Question 2

Compounds of a metal and a non-metal:

1. Write down the name of the metal.
2. Write down the name of the non-metal and then
   change the ending to -ide.

Name any 2 compounds.

Answer 2

Sodium iodide.
Calcium oxide.

Any other correctly named compound is acceptable.

Question 3

Compounds of a metal, non-metal and oxygen:

1. Write down the name of the metal.
2. Write down the name of the non-metal and then
   change the ending to -ate.

Name any 2 compounds.

Answer 3

Magnesium carbonate.
Calcium sulphate.

Any other correctly named compound is acceptable.

Question 4

Compounds containing non-metals only:

1. Name the element that is furthest left of the periodic table ( if it contains more than 1 atom, add a prefix).
2. For the second non-metal, specify the amount of atoms present by adding a prefix and change the ending to -ide.

Name any 2 compounds.

Answer 4

Sulphur trioxide.
Dinitrogen tetroxide.

Any other correctly named compound is acceptable.

Question 5

Every compound has a ________ ________ that tells
you how many atoms of each element is present in a
compound.

Answer 5

1. Chemical formula.

Question 6

You can derive the formulae of compounds that
contain metals and non-metals by using the ______ and ______ method.

The _______ of an element is the number of electrons that an element will lose, gain or share in a chemical reaction.

Answer 6

1. Swap and Drop.

2. Valency.