The radius of the second orbit of is and that of the first orbit of hydrogen is

CHEMISTRY · Single correct · CBSE · Chemistry · Structure of Atom · Structure of Atom

Problem

The radius of the second orbit of

\text{He}^+

r_{2,\text{He}^+}

and that of the first orbit of hydrogen is

r_{1,\text{H}}

. What is the ratio

\dfrac{r_{2,\text{He}^+}}{r_{1,\text{H}}}

? (a) 4 (b) 1 (c) 2 (d) 0.5