When I try to bake

Drugs

Lots of drugs

Literally, so much drugs.

You drop it in while you're pouring in the mixture

There are doctors forgetting knives in the patient's stomach
This is nothing

A mercury is always a liquid at normal temps.

I just thought it could melt after a certain amount of time even at a much lower temperature than its melting point. Besides, this might be something completely different, but you can't put a fork in the microwave without causing sparks, so what's going on there?

It's the radiation or whatever thing happens in the microwave. Completely different from plain heat in the oven

And Bismuth has an lower melting temperature than most metals