It's important because electrons, specifically valence electrons (the ones in the outer energy level) are the only part of the atom or ion that participates in a chemical reaction.
Aufbau theorized that electrons travelled in energy shells, hence the Aufbau diagram...
The principle is: electrons fill first the lower energy levels.
Pauli's Exclusion Pricipal.A single orbital can only hold 2 electrons.Hund's Rule.The most stable arrangement of electrons is that with the maximum number of unpaired electrons,all with the same spin direction.Aufbau Principle.Electrons fill the lowest energy subshell first before moving to the next subshell.
Each aluminum isotope has 13 electrons. In accordance with the Aufbau Principle those electrons will fill: 1s2, 2s2, 2p6, 3s2, 3p1. The shortcut notation is: [Ne] 3s2, 3p1.
I think this will answer your question: S holds a maximum of 2 electrons P holds a maximum of 6 electrons D holds a maximum of 10 electrons F holds a maximum of 14 electrons If you want to learn more try typing in the aufbau principle on Answers.com Or try looking up electron configurations. -Raz
Aufbau theorized that electrons travelled in energy shells, hence the Aufbau diagram...
according to Aufbau principle
Aufbau principle
Answer: Aufbau Principal Aufbau Principal: fills from the lowest energy to the highest energy level
The principle is: electrons fill first the lower energy levels.
Add the electrons in accordance with the aufbau principle and then count the unpaired ones.
the aufbau principle
This is usually called the "Pauli Exclusion Principle".
Nature prefers low energy. It is thus energetically favorable to do so.
The Aufbau principle states that electrons must be added to elements and ions in a VERY specific order with the lowest energy level being filled first and the highest last. This is where the Aufbau triangle comes in. It shows the order in which the energy levels must be filled.
The Aufbau principle states that electrons will fill up the different orbitals in an atom in order, i.e. the s orbitals of an atom will be filled by electrons before the p orbitals.
Electrons always enter to the lower orbit first,this is called auf bau principle.