Question

For which one of the following, Bohr model is not valid?

• A. Deuteron atom
• B. Singly ionised neon atom $\left(N{e}^{+}\right)$
• C. Hydrogen atom
• D. Singly ionised helium atom $H{e}^{+}$

Answer 1

The correct option is B Singly ionised neon atom $\left(N{e}^{+}\right)$

Bohr's model is valid only for the single electronic systems i.e hydrogen like atoms ( having one electron in its orbit).

Therefore, it will not be valid for a singly ionised neon atom as it has more than one electrons in its outermost orbit.