Bohr model calculations

Question

Calculate the energy for the transition of an electron from the n = 8 level to the n = 7 level of a hydrogen atom.

1. E =  ???Joules

Is this an absorption or an emission process?

1. ____???_____

Answer 1

Energy of transition= E7-E8

E7=-2.18*10^-18/7^2

E8=-2.18"10^-18/8^2

Energy of transition=-2.18*10^-18(1/7^2-1/8^2)

=-0.109*10^-18joule

=-1.09*10^-19 joule

Here emmision will takes place because negative sign is present.