The 14^th group element that decomposes steam(373 K) to form dioxide and dihydrogen gas. 

C , Si  & Ge are not affected by water.

But  Tin decomposes steam

$\mathrm{Sn}+2{\mathrm{H}}_2\mathrm{O}\stackrel{∆}{\to }{\mathrm{SnO}}_2+2{\mathrm{H}}_2$

Lead is unaffected by water due to the formation of protective oxide film.