Write a short notes on Fluorine

Explanation

1. Fluorine is an element.
2. It belongs to 7th group of periodic table.
3. It is the first halozen with atomic number 9.
4. It.s atomic weight is 18.99 g.
5. Shele explained about fluorine in 1771.
6. In 1886 Maizen seperated fluorine element from its ore.
7. It is a highly active element and so it occurs more than 55 compound forms in nature.
8. It exists in three different states such as solid, liquid and gas.
9. Fluorine occurs in liquid form in ground water, solid form in bed rock and gases form in pollutants produced by factories and industries.
10. Excess amount of fluorine in water causes fluorosis.