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 most common silver solder melting point divisions are: IT: The highest melting temperature, used on fine silver when enameling (melting point: 1490 degrees Fahrenheit) Hard: Used for bezels and as a first step when doing multiple soldering (melting point: 1425 degrees Fahrenheit)