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.
For large pools, the latter value can rise to 1100~1200Â°C. So I think it is safe to say the 1000 Â°C would be considered a hot open fire. Silver has a melting point of 962Â°C so in theory it could be possible but it would be very difficult to get a campfire hot enough to melt silver.