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P,Q,R and S are metals in the same group in the Periodic Table but in…

P,Q,R and S are metals in the same group in the Periodic Table but in periods 3,4, 5 and 6 respectively which of them loses electrons least readily?
  • A.
    P
  • B.
    C
  • C.
    R
  • D.
    S
Correct Answer: Option D
Explanation