|Metals of low atomic weight are called as light metals. Between light metals and heavy metals cut-off varies. Beryllium, Lithium, sodium, aluminium and magnesium are included. Light metals are less toxic when compared with heavy metals. Beryllium is toxic, but it is rarely found in large concentrations. Vanadium is not counted as a light metal but it is toxic. Some other light metals are toxic when they are in large amounts.
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