1. Element 1 Iron Magnesium Copper Element 2 Oxygen ________ Sulphur
We can make compounds from elements
The name of the compound can tell us what elements have combined
Element 1
Iron
Magnesium
Copper
Element 2
Oxygen
________
Sulphur
Compound
Iron Oxide
Magnesium Oxide
Copper Sulp______

2. Understanding equations
What is a word equation??
Understanding equations
Learning objectives:
Write word equations
Use symbols in equations

3. Writing a word equation
A word equation can be used to describe any chemical reaction, i.e. any process in which atoms become joined
in different ways.
The steps for writing a word equation are:
On the left-handside, put the name of the reactant(s).
If there are two or more reactants, link them with a + sign.
2. In the middle, write down an arrow ().
3. On the right-handside, put the name of the product(s).
If there are two or more products, link them with a + sign.

4. What is the word equation?
Lead reacts with oxygen to form lead oxide.
What is the word equation for this reaction?
lead oxygen  lead oxide
Why is lead oxide so different to both lead and oxygen?
The lead and oxygen don’t mix, they react to form lead oxide.
This means that the lead and oxygen atoms in the product are joined differently to the atoms in the reactants .

5. What is the word equation?
Write out word equations for the following chemical reactions.
Limestone (calcium carbonate) is heated to make calcium oxide and carbon dioxide.
Magnesium reacts with hydrochloric acid to make magnesium chloride and hydrogen.
Methane is burnt to make carbon dioxide and water.
calcium carbonate  calcium oxide +carbon dioxide
magnesium + hydrochloric acid  magnesium chloride + hydrogen
methane + oxygen  carbon dioxide + water

6. Naming simple compounds
To name simple compounds of metals and non-metals:
1. Write down the name of the metal.
2. Write down the name of the non-metal, changing the ending of the word to “-ide”.
What is the name of the compound made when the following elements combine?
magnesium and oxygen
magnesium oxide
sodium and chlorine
sodium chloride
oxygen and iron
iron oxide

7. Naming simple compounds
What is the name of each compound formed by these metal and non-metal elements?
nitrogen
lithium
sulphur
zinc
iodine
nickel
bromine
aluminium
oxygen
tin
chlorine
sodium
magnesium
iron
Name of compound
Element 2
Element 1
iron sulphide
magnesium nitride
sodium chloride
tin oxide
aluminium bromide
nickel iodide
zinc sulphide
lithium nitride

8. Chemical Symbols
We can also write equations using the chemical symbols…..
carbon
oxygen
carbon dioxide + + O C

9. Can you fill in the blanks on your sheet
Task
Can you fill in the blanks on your sheet