The president may want you, but unless you also win the approval of the U.S. Senate, it's back to the shoe store on Monday for you. Across the federal government, nearly 1,200 executive level jobs may be filled only by individuals appointed by the president and approved by a simple majority vote of the Senate.
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. Th â¦ is is where the Aufbau triangle comes in. It shows the order in which the energy levels must be filled. 10 people found this useful.
Let's combine Hund's Rule and the Aufbau Principle by looking at the electron configuration for two very common elements. Nitrogen has an atomic number of 7, and thus has 7 protons and electrons. Next to it on the periodic table is oxygen with an atomic number of 8, and thus 8 protons and electrons.