Cadmium is a metal in group IIB of the periodic table with atomic number 48, an atomic weight of 112.40, and a density of 8.65 Mg/m 3. Its melting point is 320.9 C, and it boils at 7654 C. The ...

A physicist would classify them by their atomic number on the periodic table. A chemist would base the definition upon the chemical behavior of the element. ... cadmium and beryllium.