According to Bohr’s atomic theory, which of the following are correct ?

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kinetic energy of electron $\propto \frac{Z^{2}}{n^{2}}$

velocity of electron in an orbit $\propto \frac{Z}{n}$

Coulombic force of attraction of electron $\propto \frac{Z^{3}}{n^{4}}$

Frequency of revolution of electron in an orbit $\propto \frac{Z^{2}}{n^{3}}$

answer is A, B, C, D.

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Detailed Solution

(A) According to the Bohr's atomic theory, the kinetic enerw of an electron is directly proportional to the square of the atomic number and inversely proportional to the square of the principal quantum number.
(B) The product of the velocity of electron and the principal quantum number is proportional to Z.
(C) Frequency of revolution of the electron in an orbit is directly proportional to the square of the atomic number and inversely proportional to the cube of the principal quantum number.
(D) Coulombic force of attraction on the electron is directly proportional to the square of the atomic number and inversely proportional to the fourth power of the principal quantum number.

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