
Interpretation:
The noble gas which is closest to sulfur in the periodic table needs to be determined. The change in sulphur which results it to have same electronic configuration of the nearest noble gas must also be explained.
Concept introduction:
Noble gases have very stable electronic configuration with complete octets. Some of the noble gases are He, Ne, Ar, Kr, Xe and Rn.

Answer to Problem 7E
Argon (Ar) is closest to sulfur. Two electrons must be added to sulfur to attain the electronic configuration as that of argon.
Explanation of Solution
Sulfur has
Two electrons must be added to sulfur to make the electronic configuration similar to argon.
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