The first emission line in the atomic spectrum of hydrogen i... | CHEMISTRY - DEVELOPMENTS LEADING TO THE BOHR'S MODEL OF ATOM | SolveeIt | Solveeit

Today, August 24

Question

The first emission line in the atomic spectrum of hydrogen in the Balmer series appears at -

A

$\frac{5R}{36}$ cm^–1

B

$\frac{3R}{4}$ cm^–1

C

$\frac{7R}{144}$ cm^–1

D

$\frac{9R}{400}$ cm^–1

Answer

$\frac{5R}{36}$ cm^–1

Explanation

Solution

$\bar{\nu}$ = R $\left\lbrack \frac{1}{2^{2}} - \frac{1}{3^{2}} \right\rbrack$ cm^–1