Identify the number of electrons present in the outermost shell of atoms of each of the following elements.
(i) Helium
(ii) Magnesium
(iii) Sulphur

(i) - 2, (ii) - 3, (iii) - 4

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(i) - 1, (ii) - 4, (iii) - 6

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(i) - 2, (ii) - 2, (iii) - 6

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(i) - 3, (ii) - 4, (iii) - 5

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Solution

The correct option is C (i) - 2, (ii) - 2, (iii) - 6
He $2$ has $2$ electrons in outermost shell.

Mg $2, 8, 2$ has $2$ electrons in outermost shell.

S $2, 8, 6$ has $6$ electrons in outermost shell.

Thus answer is option C.

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