The Periodic Table

Science — First Preparatory

Applications and examples from life

Comparison aspect	Main idea	Keywords
Predicting properties	if an element is in group 1 we expect it to be an active metal like sodium and we expect it to lose one electron in a reaction	elementgroupexpectactive
Neon signs	neon and argon are used in advertising lights because they do not react with other substances and they give a distinctive light when electricity passes through them	argonusedadvertisinglights
Chlorine in water	chlorine is an active halogen so it is used to disinfect drinking water and swimming pools by killing microbes	activehalogenuseddisinfect

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