Symbol: Au Atomic number: 79 Atomic mass: 196.96655 amu Number of protons/electrons: 79 Number of neutrons: 118 Melting point: 1,064.43°C (1,337.58°K, 1,947.97°F) Boiling point: 2,807.0°C (3,80.15°K, 5,084.6°F) Density @ 293°K: 19.32 grams per cubic centimeter