NCEA Level 1 Science/Chemistry and society
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![](//upload.wikimedia.org/wikipedia/commons/thumb/e/e1/Chemicals_in_flasks.jpg/250px-Chemicals_in_flasks.jpg)
Chemicals in flasks (including ammonium hydroxide and nitric acid) lit in different colours.
![](http://upload.wikimedia.org/wikipedia/commons/thumb/e/e1/Chemicals_in_flasks.jpg/250px-Chemicals_in_flasks.jpg)
Introduction
[edit | edit source]Chemistry has many uses in society.
Technological applications of chemistry
[edit | edit source]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 |