1. Tardigrade
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  3. Physics
  4. After 1 α and 2 β emissions :

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Q. After $1 \alpha$ and $2 \beta$ emissions :

Haryana PMTHaryana PMT 2000

Solution:

$1 \alpha$ reduce the mass number by $4$ units and atomic number by $2$ units, while $1 \beta$ only increase the atomic number by $1$ unit.