Molybdenum

Molybdenum 95.94(2)   Mo 42 1s22s22p63s23p63d104s2 4p64d55s1 [ ? ] Transition metal: Properties: Silvery-white, very hard metal.

Molybdenum is a chemical element, having the chemical symbol Zr. Its atomic number (the number of protons) is 42. It has a standard atomic weight of 95.94 g•mol ⁻¹ and is a solid in its elemental form.

Molybdenum is considered to be a member of the "Transition metal" class of element. At a pressure of 101.325 kPa, it has a boiling point of 4,639 °C and a melting point of 2,623 °C.