The tendency of electrons to enter orbitals of lowest energy first is called theAufbau principle.This principle states that electrons fillatomicorbitalsin order of increasing energy level, starting with thelowestenergyleveland proceeding to higher energy levels until all the electrons of the atom have been accounted for. This principle helps to explain the electron configuration of atoms and the periodic trends observed in the properties ofelementsin theperiodictable.The Aufbau principle is a fundamental concept in chemistry that helps to explain how electrons are arranged within an atom. Atoms are composed of subatomic particles, includingprotons,neutrons, andelectrons. Protons and neutrons are located in the nucleus of an atom, while electrons orbit around the nucleus in shells orenergylevels.To know more aboutAufbau principle,visit:brainly.com/question/13393709#SPJ4...

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