00:01
The total energy of electron in a bohr model is given by en, that is equal to minus m -e -4, divided by 8 -ipsilon, square, n -square, h -1 constant square.
00:17
And this we can write minus 1 over n -square, m -e, e is 4, divided by 8 -i -i -psalon -square, h -square.
00:28
This is in the units of a joules.
00:32
If you want to convert this into electron volts, then we write this is 1 over n square, minus 1 over n square, times mass of electron, e3 divided by 8, y, square, x square.
00:50
This is in joules and this is in electron vault.
00:57
Then for the given problem, we can find the angular momentum ln is related to pr this is equal to mv n r n that is n times h divided by 2 pi then we can write energy en to be minus 13 .6057 electron wall divided by n square we solved for n so n will be square root of minus 13 .6057 divided by minus 1 .51 electron volt...