Pahis

Why is melting point of helium lower than that of hydrogen at normal atmosphere pressure?

I actually have multiple questions

1) Is there a maximum temperature. Minimum temperature is now quite obvious (nothing moves) but is there a maximum?

2) Is there a high enough temperature to make atoms lose electrons or even break the bonds between protons and neutrons.

3a) Not sure if this is thermodynamics, but why does helium stay liquid at normal pressure and why hydrogen doesn't

How long until an opened wine is rendered undrinkable by oxidation of ethanol. I opened a bottle of wine and drank about half of it. It doesn't have a cork but a screw on whatever-you-callit metal top thingy. I've kept it in a room temperature closed. It has been about a week now. Is it still drinkable. It smells ok and I've drank a bit and tastes ok-ish, not as good as it did, but is it still ok to drink it.

Hope this isn't too stupid a question.