1. Tardigrade
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  3. Chemistry
  4. The transition metal with least atomic number is :

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Q. The transition metal with least atomic number is :

AFMCAFMC 2003

Solution:

Transition elements may be defined as elements whose atoms or simple ions contain partially filled $d$-orbitals. This definition does not cover zinc, cadmium and mercury as they have completely filled $d$-orbital consequently they do not exhibit characteristic properties of transition elements
$Zr =40, Os =76, Pt =78, Ru =44$
(Least at. no.)