Tin
= Tin
{title2=$\mathrm{Sn}$}
<Tin> is the <chemical element> with <atomic number> 50 and symbol $\mathrm{Sn}$. It is a <metal>. Both $+2$ and $+4$ oxidation states are common. Its different solid <allotropes> have different structures, and tin-containing solders illustrate how alloy composition can change melting and mechanical properties.<Periodic Table by Royal Society of Chemistry>[Tin, element data and uses]{ref}