1. Tardigrade
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  3. Chemistry
  4. 4 Be 7 captures a K electron into its nucleus. What is the mass number and atomic number of the nuclide formed?

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Q. ${ }_4 Be ^7$ captures a $K$ electron into its nucleus. What is the mass number and atomic number of the nuclide formed?

Structure of Atom

Solution:

${ }_4 Be ^7+{ }_{-1} e ^0 \rightarrow{ }_3 Li ^7$
So, atomic number $=3$, mass number $=7$