Re: Another possible niggle
Both gallium and indium are solid at NTP. Gallium melts at 30C, which is close to the 20C of NTP. Indium melts at 157C, so God knows what you're getting confused with there. Maybe you're thinking of alloys like https://en.wikipedia.org/wiki/Galinstan which include gallium and indium?
Only two elements are liquids at NTP, bromine and mercury. We get bromine from salt water mainly. And where do we get mercury from? H.G. Wells. --->