KS3 Science · Chemistry
The periodic table
Six short lessons. Look at the picture, learn three things, then play.
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Key words
Periodic table A chart of all the elements, arranged in rows and columns
Group A column of the periodic table
Period A row of the periodic table
Atomic number The number that gives an element its place in the periodic table
Metal An element that is usually shiny and a good conductor
Non-metal An element that is usually dull and a poor conductor
Malleable Can be hammered into shape without breaking
Ductile Can be pulled out into a wire
Brittle Shatters when it is hit
Conductor Lets electricity or heat pass through it easily
Physical property A feature you can observe without changing the substance
Chemical property How a substance reacts with other substances
Alkali metals The reactive metals in Group 1
Halogens The reactive non-metals in Group 7
Noble gases The unreactive gases in Group 0
Reactive Takes part in chemical reactions easily
Inert Unreactive: it hardly ever takes part in a reaction
Trend A pattern in a property as you go down a group or across a period