Principal quantum number gives the ................ of an electron and its distance from the nucleus.

angular momentum

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energy

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velocity

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centrifugal force

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Solution

The correct option is A energy
Principal quantum number gives the energy of an electron and its distance from the nucleus.

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= \frac{n . h}{2 π}

n

Question 21

Which of the following statements concerning the quantum numbers are correct ?

(a) The angular momentum quantum number determines the three-dimensional shape of the orbital

(b) The principal quantum number determines the orientation and energy of the orbital

(d). Spin quantum number of an electron determines the orientation of the spin of electron relative to the chosen axis.

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