In `C^(12)` atom if mass of `e^(-)` is doubled and mass of proton is halved, then calculate the percentage change in mass no. of `C^(12)`

Explanation

`{:(,,._(6)C^(12),,),(,e^(-),P^(+),N^(o),),(,6,6,6,Ararr12),(,12,3,6,Ararr9):}`
`%` change `=(3)/(12)xx100=25%`