What are light metals and what are heavy metals?
Atomic number from 23 (V) to 92 (U) of natural metal elements, there are 60 kinds, in addition to 6 of them, the other 54 relative density is greater than 4.5, so from the point of relative density, these 54 metals are heavy metals
The element classification, some of them belong to the rare earth metal, some classified refractory metals, eventually in the industry really into heavy metals into 10 kinds of metal elements: copper, lead, zinc, tin, nickel, cobalt, antimony, mercury, cadmium and bismuth. These 10 kinds of heavy metals in general and with metal density greater than 4.5 outside, no other heavy metals in common. Each of the properties of various heavy metals.
Light metals, heavy metals, by densityThe common feature of light metals is that the density is less than 4.5 g / cm3, including aluminum, magnesium, sodium, potassium, calcium, strontium and bariumThe relative (water) density is greater than 4.5, that is, the density is greater than 4.5 g / cm3
