Atomic Number	Element	Property	Symbol	Electron Arrangement
1	Hydrogen	Reactive gas	H	1
2	Helium	Unreactive gas
3	Lithium	Very reactive metal		2, 1
4	Beryllium	Metal
5	Boron	Non-metal
6	Carbon	Non-metal
7	Nitrogen	Non-metal
8	Oxygen	Non-metal
9	Fluorine	Very reactive gas		2, 7
10	Neon	Unreactive gas	Ne	2, 8
11	Sodium	Very reactive metal		2, 8, 1
12	Magnesium	Metal
13	Aluminium	Metal
14	Silicon	Non-metal
15	Phosphorus	Non-metal
16	Sulphur	Non-metal		2, 8, 6
17	Chlorine	Very reactive gas	Cl
18	Argon	Unreactive gas
19	Potassium	Very reactive metal
20	Calcium	Metal		2, 8, 8, 2

1. Use your periodic table and your knowledge of electron structure to complete the table as demonstrated.

2. Shade the “Very reactive gases” one colour.

3. Shade the “Unreactive gases” another colour.

4. Shade the “Very reactive metals” another colour.

5. Shade the “Metals” a final colour.

6. Look at each colour and the electron arrangements and try to make a comment. Write your conclusions here.