Question 143: Atoms & Nuclei

Question

Given below are two statements: one is labelled as $\mathbf{A s s e r t i o n} \mathbf{A}$ and the other is labelled as Reason $\mathbf{R}$
Assertion A : The Bohr model is applicable to hydrogen and hydrogen-like atoms only.
Reason $\mathbf{R}$ : The formulation of Bohr model does not include repulsive force between electrons.
In the light of the above statements, choose the correct answer from the options given below

Accepted Answer

Option B
Both statements are true, and the absence of electronÃ¢ÂÂelectron repulsion in BohrÃ¢ÂÂs formulation is exactly why it works only for oneÃ¢ÂÂelectron systems (hydrogen and hydrogenÃ¢ÂÂlike ions).
Ã¢ÂÂ¢ Assertion A is true: BohrÃ¢ÂÂs model applies only to atoms with a single electron.
Ã¢ÂÂ¢ Reason R is true: Bohr treated only the Coulomb attraction between nucleus and electron, omitting any repulsive force between multiple electrons.
Ã¢ÂÂ¢ Since ignoring eÃ¢ÂÂe repulsion prevents extension to multiÃ¢ÂÂelectron atoms, R correctly explains A.

Answer

$\mathbf{A}$ is true but $\mathbf{R}$ is false

Answer

Both $\mathbf{A}$ and $\mathbf{R}$ are true and $\mathbf{R}$ is the correct explanation of $\mathbf{A}$

Answer

$\mathbf{A}$ is false but $\mathbf{R}$ is true

Answer

Both $\mathbf{A}$ and $\mathbf{R}$ are true but $\mathbf{R}$ is NOT the correct explanation of $\mathbf{A}$

Atoms & Nuclei

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