## work example in class from April 16

H-Atom ($E_{n}=-\frac{hR}{n^{2}}$)

YeseniaGomez_1L
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### work example in class from April 16

I am looking at my notes and in one of the examples from class, our professor wrote E subscript 4= 1/16 x hR, can someone explain where the 1/16 came from?

Celeste Martinez 1K
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### Re: work example in class from April 16

The 1/16 comes from 1/4^2 which equal 1/16. This is done because the formula is E[n] = -hR/n^2 in order to not have that division sign, we can write it as E[n] = -1/n^2 * hR

Hope this helps!

AnnaYan_1l
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### Re: work example in class from April 16

In the equation E subscript n = (-hR)/(n^2), n = energy level. So in the worked example, at that point of the problem, we were calculating the energy at energy level 4 (n = 4):

E subscript 4 = - (hR)/(4^2)

In the next step:

E subscript 2 = (-hR)/(2^2)