A) \[H\]
B) \[H{{e}^{+}}\]
C) \[L{{i}^{2+}}\]
D) \[{{H}^{+}}\]
Correct Answer: D
Solution :
Bohrs theory is applicable only to atoms having one electron. Therefore, it is not applicable to \[{{H}^{+}}\] as it has no electron, According to Bohr. \[{{E}_{n}}=\frac{-13.6{{Z}^{2}}}{{{n}^{2}}}eV/atom\] (Z = atomic number, n = number of the shell) \[{{r}_{n}}=\frac{0.529{{n}^{2}}}{Z}\overset{\text{o}}{\mathop{\text{A}}}\,\]
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