Which of the following expressions correctly gives the radius of the th orbit for a…

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

Problem

Which of the following expressions correctly gives the radius

r_n

of the

n

th orbit for a hydrogen-like ion in terms of the Bohr radius

a_0

, principal quantum number

n

, and atomic number

Z

? (a)

r_n = n^2 a_0 Z

(b)

r_n = \dfrac{n a_0}{Z}

(c)

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

(d)

r_n = n^2 a_0