What is the Noble Gas Abbreviated Notation for the electron configuration of an aluminum atom? A) [Ne] 3s2 3p1 B) [Ar] C) [Ne] D) [Ne] 3s2 3d1 E) [Ne] 2s2 2p1 Note: I don't understand how to know if it would be 3s or 2s? If that makes sensePlease explain how you know the answer so I can do the rest of my homeworkGreatly Appreciated :)
There are 13 protons, 14 neutrons, and 13 electrons :)
Aluminum has the atomic number of 13The next lower noble gas is Neon with the atomic number of 10So you take Neon's configuration [Ne] plus 3 more electrons[Ne] 3s2 3p1 The s shell fills first in the 3rd level and then the p orbitals start to fillGoogle Aluminum noble gas configuration gives you [Ne] 3s2 3p1 I don't understand how to know if it would be 3s or 2s? If that makes sense You need to learn your orbitals and the fill order 1s can hold 2 electrons 2s can hold 2 electrons 2p can hold 6 electrons and fills the 2s levelThis is a total 10 electrons, thus it's also the electron configuration for Neon.
