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.
The melting point of silver solder varies, depending on the chemical composition of the solder being used. Solder that is composed of 56 percent silver will have a melting point of 1,145 degrees Fahrenheit, while solder composed of 80 percent silver melts at 1,370 degrees Fahrenheit.