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Identify the number of electrons each of the following atoms needs to gain or lose to have a stable outer electron configuration.

sodium (Na):
strontium (Sr):
sulfur (S):
astatine (As):

Respuesta :

Sodium (NA) : it’s outermost electron is 1
It still needs +7for it to be stable
Strontium (sr)

Sulphur(s) : it’s outermost electron is 6 it still needs +2 for it to be stable
Astatine(Ar):

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