JEE CHEMISTRY MCQ: STRUCTURE OF ATOM

1 Hard

1 of 1

Application +4 | -1

Positronium is a species consisting of an electron bound to a positron. What would be the radius of its first excited state?

View answer and explanation

Correct option: D

4.24 ~\mathop {\text{A}}\limits^ \circ

The correct answer is

4.24 ~\mathop {\text{A}}\limits^ \circ

because the radius of the first excited state of positronium is calculated using the formula

r_n = 2 a_0(n)^2

with n=2.

More Questions from STRUCTURE OF ATOM

Practice All Chapter MCQs →

n^{\text {th }}

\mathrm{A}

\times 10^{12}

\frac{1}{{ }^{\prime} \mathrm{B}^{\prime}}

\ell = 1,\,\,m = 0

1.25 \times {10^{ - 13}} \times {A^{1/3}}\mathrm{cm}.