what is auf-bau's principle in chemistry?

Answer 1

electrons in an atom first enter into lowest energy orbital. then it enters in to high energy orbitals step wise.

according to general law of nature,a physical system has maximum stability in its lowest energy state. if atoms have maximum stability at the standard temperature and pressure, their energy states should be the lowest. if the total energy of an atom is taken as the sum of energies of electrons therein, then in normal or ground state of atoms electrons should occupy orbitals of lowest possible energy. thus for the ground state of an atom the orbitals of higher energy can be filled only after all orbitals of lower energy are completely filled up. this type of arrangement of electrons is known as auf bau principle.



eg...electrons first fill up s orbital n only then can proceed to the p orbital n dis arrangement gets complicated once u start entering orbitals of higher energy levels....

Answer 2

the literal meaning of the term auf-bau is building block. So the principle governs how the electrons should be arranged in an atom. According to the principle an electron should fill a lower energy level before a higher one. Energy level is a space around the nucleus where the electron revolves. Generally lower energy levels are near the nucleus and those with higher energy further away.