ElectronConfiguration

ElectronConfiguration - Electron Configuration Na 1 s 2 2 s...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Electron Configuration Na: 1 s 2 2 s 2 2 p 6 3 s 1 Na: [Ne] 3 s 1 • Electron configurations tells us in which orbitals the electrons for an element are located. • Three rules: – electrons fill orbitals starting with lowest n and moving upwards; – no two electrons can fill one orbital with the same spin (Pauli); – for degenerate orbitals, electrons fill each orbital singly before any orbital gets a second electron (Hund’s rule). Electron Configurations Filling Diagram for Sublevels Aufbau Principle Electron Configurations • The electron configuration of an atom is a shorthand method of writing the location of electrons by sublevel. • The sublevel is written followed by a superscript with the number of electrons in the sublevel. – If the 2 p sublevel contains 2 electrons, it is written 2 p 2 Writing Electron Configurations • First, determine how many electrons are in the atom. Iron has 26 electrons. • Arrange the energy sublevels according to increasing energy: – 1 s 2 s 2 p 3 s 3 p 4 s 3 d … • Fill each sublevel with electrons until you have used all the electrons in the atom: – Fe: 1 s 2 2 s 2 2 p 6 3 s 2 3 p 6 4 s 2 3 d 6 • The sum of the superscripts equals the atomic number of iron (26) •...
View Full Document

Page1 / 19

ElectronConfiguration - Electron Configuration Na 1 s 2 2 s...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online