Zinc is a chemical element with the symbol Zn and atomic number 30. It is a slightly brittle metal at room temperature and has a shiny-greyish appearance n pure form. Zinc is the 24th most abundant element in Earth's crust and has five stable isotopes. The most common zinc ore is sphalerite (zinc blende), a zinc sulphide mineral.
Zinc is the second most abundant metal in the body, after iron. The average adult human has 1.5–2.5 grams of zinc, with about 60 per cent in skeletal muscle, 30 per cent in bone, 5 per cent in liver and skin, and the remaining 5 per cent in other tissues.
There is an interesting story about zinc. One day, early in the 19th century, the Royal Navy approached Sir Humphrey Davy , the famous chemist and inventor, with a big problem. , Shipbuilders had been lining the bottoms of their ships with copper to protect them from a kind of mollusk that bore into wood, but unfortunately, the....
