Chlorine is very reactive metal
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chlorine is a non metal
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- Chlorine atoms have a lot of valance electrons without being complete on its own, so it has a greater need to seek it's conjugates.
- That's called Electronegativity. Halogens are highly reactive because of their electronegativity.
- The most common compound of chlorine, sodium chloride (common salt), has been known since ancient times.
- Around 1630, chlorine gas was first synthesised in a chemical reaction, but not recognised as a fundamentally important substance.
- Carl Wilhelm Scheele wrote a description of chlorine gas in 1774, supposing it to be an oxide of a new element.
- In 1809, chemists suggested that the gas might be a pure element, and this was confirmed by Sir Humphry Davy in 1810, who named it from Ancient Greek: χλωρός, romanized: khlôros, lit. 'pale green' based on its colour.
- Because of its great reactivity, all chlorine in the Earth's crust is in the form of ionic chloride compounds, which includes table salt.
- It is the second-most abundant halogen (after fluorine) and twenty-first most abundant chemical element in Earth's crust.
- These crustal deposits are nevertheless dwarfed by the huge reserves of chloride in seawater.
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