The electron in the third Bohr orbit of Li ( ) has the same speed as an electron in…

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

Problem

The electron in the third Bohr orbit of Li

^{2+}

(

Z = 3

) has the same speed as an electron in the fifth Bohr orbit of a hydrogen-like ion X

^{(Z-1)+}

. What is the atomic number

Z

of element X? (a)

4

(b)

5

(c)

3

(d)

8