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Answer: D) It has two more electrons than protons.
Explanation: Sulphur (S) is an element with atomic number 16 and thus contains 16 electrons. A neutral atom contains equal number of protons and electrons.
An atom on losing electrons gains positive charge and on gaining electrons gain negative charge.
Sulphide ion is formed by gaining 2 electrons to attain stable configuration of argon and thus contains two more electrons than protons.