Question

Write four points, which shows importance of principal quantum number.

Answer 1

• The principle quantum number ( n ) describes the energy level, which can have any whole number value equal or greater than 1.

• In electrons about a nucleus these are described as shells, where each shell is, on average, a little further from the nucleus. For historical reasons these are labeled K,L, M and N (not to be confused with quantum numbers themselves).

• Quantum numbers are important because they can be used to determine the electron configuration of an atom and the probable location of the atom's electrons.

• They are also used to determine other characteristics of atoms, such as ionization energy and the atomic radius.

hope it helps!!

Answer 2

A quantum number is a number that gives an estimate of the likely position of an electron in an atom.

Explanations:

• The principal quantum number n indicates the principal electron shell. Since n represents the most likely distance between the electron and the nucleus.
• A number called the principal quantum number indicates the energy level and the relative distance from the nucleus.

• This number describes the electron levels of an atom.

• It represents the size of the electron cloud.