Which of the following expressions gives the radius of the th orbit of an electron in…

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

Problem

Which of the following expressions gives the radius

r_n

of the

n

th orbit of an electron in a hydrogen-like atom of atomic number

Z

in terms of the Bohr radius

a_0

? (a)

r_n = \dfrac{a_0 n^2}{Z}

(b)

r_n = a_0 Z n^2

(c)

r_n = \dfrac{a_0 n}{Z^2}

(d)

r_n = \dfrac{a_0}{Z n^2}