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The atoms of four elements are represented as 20Q, 16R, 10S and 8T Which of…

The atoms of four elements are represented as 20Q, 16R, 10S and 8T Which of the elements would be unreactive?
  • A.
    Q
  • B.
    R
  • C.
    S
  • D.
    T
Correct Answer: Option C
Explanation