questions need answers

What determines melting point?
Why does not nitric acid react with gold as with others?

The melting point is when something melts. (obviously) Probably not the answer you're looking for.

Gold is very chemically inert most of the time. Nitric acid alone can dissolve trace amounts of gold, but only trace amounts. Gold dissolves in auqa regia (nitric+hydrochloric), hydrochloric+hydrogen peroxide, in hydrocyanic acid (cyanide),and in other metals, mercury, lead,silver,copper.

Well that's not the ansthat to my question.
An alchemist might say that gold is a perfect body of red mercury and
Pure and fixed red sulpher.But my question is to a chemist. Is there something inside gold item or may be something else (H) due to which there is no reaction.

The way I understand it is gold is inert, because it's so reactive. Just like nitrogen in our atmosphere is inert. Nitrogen actively creates a very powerful chemical bond with other nitrogen atoms and not much else. When you manage to break those bonds, the nitrogen immediately bonds to oxygen and you get nitric acid. Nitric acid is suddenly very reactive made from something considered inert.

Gold is the same way, it forms a very powerful chemical bond with other gold atoms. This bond is so strong that extremely few things are reactive enough to break this bond. Even if you do manage to break it,you still have the problem of keeping it that way. Gold is actually reactive enough to make some very sensitive explosives.