Niels Bohr was the one who stated that first.
Electrons occupy special regions called energy levels, or shells, which surround the nucleus.
electrons are arranged in energy levels, or shells, around the nucleus of an atom.
yes they do :D
Energy levels or energy shells or orbits
The electrons in actinium are disposed on seven energy levels.
Electrons can be found in regions of space around the nucleus called electron shells or energy levels. These shells are designated by the principal quantum number, with the first shell closest to the nucleus and subsequent shells further away. Within each shell, electrons occupy specific orbitals, which are specific regions where electrons are most likely to be found.
The electrons in actinium are disposed on seven energy levels.
The electrons in an atom are located in what is called the electron cloud. The electron cloud is an "area of probability" where electrons may be. The electrons actually occupy fixed energy levels, the so-called Fermi energy levels, around the nucleus of the atom, and we identify these energy levels as shells and orbitals. Links to relevant posts can be found below.
Three electron shells.
Electrons are located on Energy levels (shells) which surround the Nucleus which is made up of Protons and Neutrons.
Neil Bohr discovered that each electron shell has specified energy levels and limited place for electrons.
Shell or energy level corresponds to the shell in which the electrons are present.