Jin Hu's main chain is gold, also known as gold, with chemical symbol Au, atomic number 79, atomic weight 197 and mass number 183-204. The melting point of gold is 1063℃ and the boiling point is 2808℃. The density of gold is relatively high, which is 19.32g/cm3 at 20℃.

Gold is soft and easy to forge and extend.

The current technology can grind gold into a film with a thickness of 0.0000 1 mm; When gold is drawn into filaments, 1 g gold can be drawn into filaments with a length of 3.5 kilometers and a diameter of 0.0043 mm.

The hardness of gold is low, the mineral hardness is 3.7, and the hardness of 24K gold jewelry is only 2.5.