Question

Which atom woukd tend to lose one valence electron to another atom to become stable

Answer 1

An atom/electron (forgot which one) needs to have 8 atoms/electrons to become stable, hope I helped even tho I didn’t really understand the question

Answer 2

If you are saying losing an electron, so yes every atom needs to be in octate stage(8 electron) in outermost shell and if any atom have one extra electron than it loses electron gains positive charge and became stable by completing octet or duplet. They are found in first column of periodic table.

Examples - Na(sodium)