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Which of these elements can become stable by losing 1 electron? Explain

ACalcium
BArgon
CSoduim
DNitrogen
EOxygen

F. Chlorine

Verified Answer :

CSodium.
This is correct because it would then become like the noble gases, which are not reactive because they have 8 valence electrons in their outer shell. Therefore, it will become stable because it would have 8 valence electrons in its outer shell.