The principal quantum number indicates what property of an electron?

Position

Speed

Energy level

Electron cloud shape

The principal quantum number indicated energy level property of an electron.

A quantum mechanical system or particle that is bound-that is, confined spatially-can only take on certain discrete values of energy. This contrasts with classical particles, which can have any energy. These discrete values are called energy levels.

The principal quantum number indicated energy level property of an electron

Explanation

principal quantum number (n) represent the relative overall energy of each orbital it is used in quantum mechanic to describe atomic orbitals or arrangement of electrons around a nucleus The set of orbitals with the same n value are often referred to as energy levels or electron shells