which of these elements can become stable by losing one electron

Question

I dont know which ones evan work im just so cunfuzled 

Answer 1

You did not provide a list of candidate elements to choose from.  But based on the wording of the question, it would likely be an alkali metal, which has only 1 electron in its outer band.  Alkali metals are in the far left column of the periodic table.  They are Li, Na, K, Rb, Cs, and Fr.