6 According To The Aufbau Principle
6 According To The Aufbau Principle. The Aufbau principle works for nearly every element tested. Elements such as copper and chromium are exceptions because their electrons fill and half-fill two subshells, with some electrons in the higher energy level shells.
Everything in the universe is driven to minimize its potential energy. The aufbau principle, from the German Aufbauprinzip (building-up principle), also called the aufbau rule, states that in the ground state of an atom or ion, electrons fill subshells of the lowest available energy. Hund's Rule Use the Aufbau principle to determine the electron configuration of an atom.
This procedure is called the Aufbau principle , from the German word Aufbau ("to build up").
According to the Aufbau principle, electrons fill the lowest energy sublevels before filling higher energy sublevels.
There are two exceptions to this principle, chromium, and copper. Mastering the Aufbau principle may seem like a daunting challenge, but it will become simple with practice. The Aufbau principle works for nearly every element tested.
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