75 Re 186.2071

Rhenium

TRANSITION METAL

Phase: Solid

Discovered: Masataka Ogawa

Block: D

Summary

Rhenium is a chemical element with symbol Re and atomic number 75. It is a silvery-white, heavy, third-row transition metal in group 7 of the periodic table. With an estimated average concentration of 1 part per billion (ppb), rhenium is one of the rarest elements in the Earth's crust.

Appearance: silvery-grayish

Source: Wikipedia

Physical Properties

Atomic Mass 186.2071 u

Density 21.02 g/cm³

Melting Point 3459 K

Boiling Point 5869 K

Molar Heat 25.48 J/(mol·K)

Electron Affinity 5.8273 kJ/mol

Ionization Energies

1^st: 760 kJ/mol

2^nd: 1260 kJ/mol

3^rd: 2510 kJ/mol

4^th: 3640 kJ/mol