Chemistry
Topic 2 Atoms and elements
Activity 2: From elements to compounds
1
Here is some information about five mystery elements.
Element
Melting
point (°C)
Reacts with …
Metal or
non-metal
carbon
oxygen
water
calcium
A
1085
metal




B
–219
non-metal




C
3550
non-metal




D
64
metal




E
−189
non-metal




Use the key below to identify the mystery elements.
A is
B is
C is
D is
E is
KS3 Chemistry Dynamic Learning © Hodder and Stoughton 2013
1
Chemistry • Topic 2 • Atoms and elements
2
Complete the Venn diagram below including these examples:
carbon dioxide
3
a)
H2O
Oxygen
hydrogen
Cu
carbon
F2
Ca
If CO2 is called carbon dioxide what do you think SO2 is called?
Draw a particle diagram showing the gas SO2. Include a key.
b)
If NaCl is called sodium chloride and NaBr is called sodium bromide, what do
you think NaI is called?
Draw a particle diagram showing the solid NaI. Include a key.
c)
If copper reacts with oxygen (O2) to make copper oxide (CuO) and calcium
reacts with oxygen, what do you think the name of the product will be?
Draw a particle diagram of the reaction. Show the solid calcium, the gas oxygen
and then the solid product you predicted will be formed.
d)
There are two liquid elements – the non-metal bromine (Br2) and the metal
mercury (Hg).
Draw particle diagrams for these substances. Include a key.
e)
Look at this diagram of a chemical reaction. Try to write out the names and
formulae of the substances reacting. Describe and explain what is shown in the
final box.
KS3 Chemistry Dynamic Learning © Hodder and Stoughton 2013
2