How many completely full sublevels are in a neutral atom of magnesium?

4 sublevels are completely filled.

Explanation:

Magnesium is present in group 2.

Its atomic mass is 24 g/mol.

Its atomic number is 12.

It is alkaline earth metal.

Electronic configuration of Mg:

Ma₁₂ = 1s² 2s² 2p⁶ 3s²

From above given electronic configuration we can see all sublevels are completely filled.

The 1st energy level have one sub level (1s)  which is completely filled, 2nd energy level have 2 sublevel (2s and 2p) and 3rd energy level have one sublevel (3s) completely filled. So all are completely filled.

there are no statements provided but here is why:

sulfur belongs to group 16 because it can be found in nature whether it is in a free or combined state.

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