Question

Which hydrogen like species will have same radius as that of Bohr orbit of hydrogen atom?

• A. $n=2,L{i}^{2+}$
• B. $n=2,B{e}^{3+}$
• C. $n=2,H{e}^{+}$
• D. $n=3,L{i}^{2+}$

Answer 1

Answer: (B)

Expression for Bohr's orbit is, $r_n=\frac{a_0{n}^2}{Z}=a_0$
when $n=2,Z=4$.