Question

# Energy of electron in first orbit of hydrogen atom is:

A
13.6 eV
B
27.2 eV
C
54.4 eV
D
none of the above

Solution

## The correct option is A $$- 13.6\ eV$$As for hydrogen atom, $$z = 1,$$$$n=1$$. $$E=-13.6\dfrac{z^2}{n^2}\ eV$$. Substituting the value of $$n, z$$ we get $$E=-13.6\ eV$$Hence, the correct option is $$\text{A}$$Chemistry

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