Question

For which of the species is Bohr's theory not applicable?

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

Answer 1

The correct option is C $H{e}^{2+}$

Bohr's theory is applicable only for $H$ like atoms. Since $H{e}^{2+}$ ion has no electrons, it does not validate Bohr's theory.