Question

principle quantum number describe??​

Answer 1

The principal quantum number, , 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 , describes the shape of the orbital.

Answer 2

This represents the main energy level or shell in which the electron is present.

It also determines the average distance of the orbital or electron from the nucleus.

It is denoted by the letter n and can have any integral value such as 1,2,3,4...

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