what are some physical and chemical properties of gold?
['Density : 19,300 kg per cubic metre.', 'Melting point : 1337.33 K (1064.18 °C).', 'Boiling point : 3129 K (2856 °C).', 'Atomic number : 79.', 'Nucleic protons : 79.', 'Atomic weight : 197.', 'Nucleic neutrons (normal) : 118.']