20.1
Groups and periods
How the periodic table is arranged: groups, periods, families, metals and non-metals, and symbols.
20.2
Mendeleev’s periodic table
How Mendeleev sorted the elements, left gaps, and predicted elements nobody had found.
20.3
Metals and non-metals
Testing elements in a circuit, with a hammer and with a magnet, and what their oxides do in water.
20.4
Patterns in groups
Group 1, Group 7 and Group 0: their reactions, the patterns down each group, and predictions.
Daily 5
Five quick diagram questions a day from this unit. The ones you get wrong come back sooner. Progress saves in this browser.
What this unit covers
Mapped to the KS3 national curriculum (Chemistry: the periodic table).
| Programme of study | Lesson |
|---|---|
| the periodic table: periods and groups; metals and non-metals | 20.1 |
| the principles underpinning the Mendeleev periodic table | 20.2 |
| the varying physical and chemical properties of different elements | 20.3, 20.4 |
| how patterns in reactions can be predicted with reference to the periodic table | 20.2, 20.4 |
| the properties of metals and non-metals | 20.3 |
| the chemical properties of metal and non-metal oxides with respect to acidity | 20.3 |