What of the element out of calcium argon sodium nitrogen oxygen and chlorine can become stable by losing 1 electron?

What of the element out of calcium argon sodium nitrogen oxygen and chlorine can become stable by losing 1 electron?
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Sodium. A sodium atom has one valence electron in its 3rd energy level. This is very unstable, so a sodium atom will lose that single valence electron to another atom (nonmetal), and the 2nd energy level will then have 8 valence electrons, which is stable. The positively charged sodium ion, Na+, will bond with a negatively charged ion; either a nonmetal or a polyatomic ion.
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