Question

$E_n=-\frac{313.6}{n^2}$, if the value of $E_n=-34.84$ to which value 'n' corresponds:

• A. 4
• B. 3
• C. 2
• D. 1

Answer 1

The correct option is B 3

Given:
$E_n=-\frac{313.6}{n^2}$......(1)

$E_n=-34.84$......(2)

From (1) and (2)

$-34.84=-\frac{313.6}{n^2}$

$n^2=\frac{313.6}{34.84}=9$

$n=3$