Symbol: F
Atomic number: 9
Atomic weight: 18.9984
A poisonous pale yellow gaseous element belonging to group 17 of the periodic table (The halogens). It is the most chemically reactive and
electronegative element. It is highly dangerous, causing severe chemical
burns on contact with flesh. Fluorine was identified by Scheele in 1771
and first isolated by Moissan in 1886.
click here...
Sexual Intercour...
Fluorescence
Fluvial
