It dissolves in water, forming nitric acid.
It is very hygroscopic, dissolves readily in water, and rapidly undergoes oxidation on exposure to air.
Dilute nitric acid readily dissolves the metal, with formation of nitrate Pb(N03)2.
It dissolves readily in strong nitric acid, and the helium contained is thus liberated.
It decomposes steam at a red heat, and slowly dissolves in dilute hydrochloric and sulphuric acids, but more readily in nitric acid.