< NCEA Level 1 Science 
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 |
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