The number of electrons in $2.1 \ g$-ion of $Cl^{-}$ is

  • A
    $2.1$
  • B
    $2.1 \times 18$
  • C
    $2.1 \times 18 \times 6.023 \times 10^{23}$
  • D
    $2.1 \times 18 \times 6.023 \times 10^{22}$

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