In order to become a chemically stable ion a neutral atom of calcium will?

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It would have to lose two electrons.
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How do atoms bond to become chemically stable?

STABLE AND UNSTABLE ATOMS: Just like sodium, it has 1 electron on the outer shell and 8 in 2nd shell so it will donate one electron to another atom to become stable similarly

Why is the calcium ion Ca2 plus more stable than the calcium atom Ca?

All atoms want to have full valence shells and calcium has 20 electrons: two on the first energy level, 8 on the second, 8 on the third and 2 on the fourth. If it loses two an