an electron in n=5 emits 4052 nm to what energy level does the electron move

Answer 1

1/wavelength = R(1/n^2 - 1/25)
Remember to convert wavelength to m
In the above n^2 is n1 squared and 1/25 is 1/n2 with n2 squared.

Answer 2

R = Rydberg constant = 1.0973E7 m^-1

Answer 3

i got 6.667. what does this mean?

Answer 4

It means you did something wrong.
Post your work and I'll find the error BUT first, did you change 4052 nm to m?