Zinc, in commerce also spelter, is a chemical element with symbol Zn and atomic number 30. It is the first element of group 12 of the periodic table. In some respects zinc is chemically similar to magnesium:its ion is of similar size and its only common oxidation state is +2.
Three reasons Zinc stands out
- 1
Used to coat iron to prevent rusting.
- 2
Its oxide is the active ingredient in many mineral sunscreens that block UV radiation.
- 3
It is an essential mineral for immune function, and deficiency affects an estimated two billion people worldwide.
Sacrificial metal and biological necessity
Zinc protects steel by corroding in its place, a process called galvanization. The body uses zinc ions in hundreds of proteins, including enzymes and DNA-binding structures. Brass combines zinc with copper, while zinc oxide lends ultraviolet protection to sunscreens and rubber products.