Chemistry non - metals

Noble Gases

-  Party Balloons

-  Air Ships

Because argon is so unreactive the bulb can get very hot without any chance of reaction

- Very low density 

- Very unreactive 

Advertisment Signs 

gives out light when electricity is passed through it

- Light Bulbs 

- Welding 

- very unreactive 

The Halogens 

chlorine can be obtained from compounds found in sea water. Chlorine can be obtained from this by electrolysis. however the amount of iodine compounds in sea water is much lower as it is not economically viable ( too expernsive ) 

- Toothpaste 

- Mouthwash 

- Fluoride tablets 

- added to some water supplies 

Prevent tooth decay 

- some people disagree with adding fluoride to drinking water because it  removes thier freedom of choice 

- high doses can harm teeth 

- could lead to illnesses like stomach cancer 

- added to drinking water to kill bacteria 

- added to swimming pools to kill bacteria 

- Toxic so kills bacteria 

but it has to be closely monitored so that it doesnt harm people 

used as a antiseptic to kill of bacteria 

Hydrogen + Oxygen -> water

2 H2 + O2 -> 2 H2O

they are non renewable 

meaning that is can only be used once

- forms only water vapour on burning so doesnt contribute to global warming 

- lots of energy is released when its burned 

- its is a renewable source

- hydrogen is easily ignited

- it is hard to store enough energy for long journeys 

- hydrogen is explosive and dangerous when storing large amounts 

- hydrogen is expensive to extract from water because you need to use electricity to extract it and electricity is very expensive when using large amounts