Board Thread:Fun and Games/@comment-30451622-20161108170537/@comment-30451622-20161113055713

https://en.wikipedia.org/wiki/Heavy_metals

Heavy metals - Wikipedia

Heavy metals are metals with relatively high densities, atomic weights, or atomic numbers, depending on the context. They are usually the denser metals in metallurgy, or the metals with higher atomic numbers in physics, whereas chemists distinguish heavy metals by their chemical behaviour.