Question

The principal quantum number of an atom
represents :
- (a) Size and energy of the orbit
(b) Spin angular momentum
(c) Orbital angular momentum
(d) Space orientation of the orbital​

Answer 1

Explanation:

The principal quantum number, n, describes the energy of an electron and the most probable distance of the electron from the nucleus. In other words, it refers to the size of the orbital and the energy level an electron is placed in. The number of subshells, or l, describes the shape of the orbital.

(a) Size and energy of the orbit

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Answer 2

a) Size and energy of the orbit

• The principal quantum number, n, describes the energy of an electron and the most probable distance of the electron from the nucleus. In other words, it refers to the size of the orbital and the energy level an electron is placed in. The number of subshells, or l, describes the shape of the orbital.