JEE CHEMISTRY MCQ: STRUCTURE OF ATOM

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Select the incorrect option among the following

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Correct option: A

\mathrm{e} / \mathrm{m}

ratio of proton is

1.758820 \times 10^{11} \mathrm{C} \mathrm{g}^{-1}

Option A (

\mathrm{e} / \mathrm{m}

ratio of proton is

1.758820 \times 10^{11} \mathrm{C} \mathrm{g}^{-1}

) is correct because the given value is the e/m ratio for an electron, not a proton. The e/m ratio for a proton is much smaller.

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n^{\text {th }}

\mathrm{A}

\times 10^{12}

\frac{1}{{ }^{\prime} \mathrm{B}^{\prime}}

\ell = 1,\,\,m = 0

1.25 \times {10^{ - 13}} \times {A^{1/3}}\mathrm{cm}.