Which among the following elements has lowest density and is lightest?

Which among the following elements has lowest density and is lightest?
  1. Scandium
  2. Cobalt
  3. Copper
  4. Iron

Solution

In $3 \mathrm{~d}-$ series elements, across the series density and mass increases from $\mathrm{Sc}$ to $\mathrm{Zn}$. Therefore, Scandium has lowest density and is lightest.

Asked in: MHT CET 2020 (12 Oct Shift 1)

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