NCEA Level 1 Science/Chemistry and society

Chemicals in flasks (including ammonium hydroxide and nitric acid) lit in different colours.

Introduction

Chemistry has many uses in society.

Technological applications of chemistry

Metala	Physical Properties	Reactivity	Uses
Sodium	Soft, shiny	Extreme	Too reactive
Calcium	Hard, grey	Extreme	Too reactive
Magnesium	Light, malleable	Highly	Alloys, flares
Aluminium	Shiny, malleable	Mildly	Window frames
Zinc	Shiny, malleable	Mildly	Galvanise nails
Iron	Dense, conducts heat	Mildly	Bridges
Lead	Grey, dense	Unreactive	Batteries, flashings
Copper	Thermal and electrical conductor	Unreactive	Wires