Editing Period 4 element (section)

===Zinc===
[[File:Zinc fragment sublimed and 1cm3 cube.jpg|frameless|left|upright=0.3]]
[[Zinc]] (Zn) is an element in [[group 12 element|group&nbsp;12]]. Zinc is one of the main components of [[brass]], being used since the 10th century BCE. Zinc is also incredibly important to humans; almost 2 billion people in the world suffer from zinc deficiency.  However, too much zinc can cause copper deficiency. Zinc is often used in batteries, aptly named [[carbon-zinc batteries]], and is important in many platings, as zinc is very corrosion resistant.