Question

Для чего было придумано главное квантовое число?

Answer 1

Главное квантовое число показывает номер энергетического уровня и характеризует энергию электрона данного энергетического уровня.
Вывод: Для характеристики электрона определенного энергетического уровня.

Answer 2

The Purpose of the Principal Quantum Number

The principal quantum number is one of the four quantum numbers used to describe the energy levels and electron configurations of atoms. It is denoted by the symbol "n". The principal quantum number determines the energy level or shell in which an electron resides in an atom.

The main purpose of the principal quantum number is to define the size and energy of an electron's orbital. Each energy level, or shell, is associated with a specific value of the principal quantum number. The value of "n" can be any positive integer starting from 1.

As the principal quantum number increases, the energy level and the average distance of the electron from the nucleus also increase. Electrons with higher principal quantum numbers are found in higher energy levels, farther away from the nucleus.

The principal quantum number also determines the maximum number of electrons that can occupy a particular energy level. The maximum number of electrons in an energy level is given by the formula 2n^2, where "n" is the principal quantum number. For example, the first energy level (n=1) can hold a maximum of 2 electrons, the second energy level (n=2) can hold a maximum of 8 electrons, and so on.

The principal quantum number is an essential concept in understanding the electronic structure of atoms and the periodic table. It helps determine the arrangement of electrons in orbitals and the chemical properties of elements.