In 1913 Niels Bohr proposed a new model of the atom that included quantized electron orbits: electrons still orbit the nucleus much as planets orbit around the sun, but they are only permitted to inhabit certain orbits, not to orbit at any distance.
About reports the melting point of gold is 1,064.43 degrees Celsius. The melting point of a solid is the temperature at which it becomes a liquid. Gold's boiling point is 2,807 degrees Celsius.
Silver has a melting point of 1,234.93 Kelvin and a boiling point of 2,435 Kelvin. It is a metal that is solid at room temperature and has a density of 10.501 grams per cubic centimeter. It has been used for more than 5,000 years and can be found today in silver ores and in deposits of lead, gold and copper ores.