JEE CHEMISTRY MCQ: STRUCTURE OF ATOM

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The atomic weight of an element is double of its atomic number. If there are four electrons in

2 p

orbital, the element is isotonic with

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Correct option: B

{ }_7 {~N}^{15}

Option B (+0.5 kcal eq⁻¹) is correct because the enthalpy of dissociation of CH₃COOH can be calculated from the difference between the neutralization enthalpies of a strong acid/strong base and a weak acid/strong base reaction.

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Which of the following is paramagnetic? The time taken by the electron in one complete revolution in the

n^{\text {th }}

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\mathrm{A}

\times 10^{12}

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in magnesium atom is The nucleus and an atom can be assumed to be spherical. The radius of the nucleus of mass no. A is given by

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

. The atomic radius of atom is 1 Å. If the mass no. is 64, the fraction of the atomic volume that is occupied by nucleus is: