test

2. Draw up two columns headed 'elements' and
'compounds'. Put these into the correct column.
N2
O2
H2
0
Cu
HCl
Cl2
S
C2
H5
OH
H2
SO4
Fe
NaOH
Fe2
S3
Write down the number of atoms in each

3. Elements
Compounds
N2
O2
S
Cu
Fe
Cl2
H2
0
C2
H5
OH
H2
SO4
HCl
NaOH
Fe2
S3
2
2
1
1
1
2
2
3
6
3
9
7

4. Chemical Reactions

We can heat, mix and even put electricity
through substances.

When a NEW substance is formed we call it a
chemical reaction
Reactants → Products

5. Eg. AIR
Eg. WaterEg. Oxygen

6. PART A

Iron filings in a test tube

Test with magnet

Repeat with sulphur

Add HCl acid to the test tube

Observe then repeat with sulphur

Add 2 spatulas of Sulphur and 1 spatula of Iron filings
to a test tube.

Mix thoroughly and then test with magnet. What
happens?
ANSWER QUESTIONS & CONCLUSIONS PAGE 174

7. PART A

Iron filings in a test tube

Test with magnet

Repeat with sulphur

Add HCl acid to the test tube

Observe then repeat with sulphur

Add 2 spatulas of Sulphur and 1 spatula of Iron filings
to a test tube.

Mix thoroughly and then test with magnet. What
happens?
ANSWER QUESTIONS & CONCLUSIONS PAGE 174