L04PerTable145s10

L04PerTable145s10 - Lecture 4: Atomic Structure & the...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Lecture 4, spring 2010 ENGR 145: Chemistry of Materials Case Western Reserve University Lecture 4: Atomic Structure & the Periodic Table Reading assignment: OGC §3.1, §5.3 Learning Objectives: Understand how the electronic structure of atoms is reFected in the periodic table Use the Pauli Exclusion principle and Hund’s rules to depict the electron con±guration in atoms, given their atomic number Know trends in rows and columns of the periodic table: Atomic and ionic sizes Ionization energies Electron affinity
Background image of page 1

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

View Full DocumentRight Arrow Icon
Lecture 4, spring 2010 ENGR 145: Chemistry of Materials Case Western Reserve University Electron Configurations (OGC §5.3) The ground-state electron confguration oF an element satisfes three rules: Aufbau principle: Electrons fll lowest energy orbitals frst Pauli exclusion principle: Max. 2 electrons per orbital (no two electrons may have same values oF all Four quantum numbers) Hund’s rules: Electrons occupy empty orbitals in a shell, spins parallel, beFore pairing up
Background image of page 2
ENGR 145: Chemistry of Materials Case Western Reserve University Mnemonic for Ground-state Electron Configurations 8s 8p 8d 8f 2 2 + 6 2 + 6 + 10 2 + 6 + 10 + 14 2 + 6 + 10 + 14 2 + 6 + 10 2 + 6 1 total = 119 1) Start with the top arrow 2) Follow the direction of the arrow (right to left) 3) Do the same with next arrow down 4) Repeat until the desired number ( Z ) of electrons is reached To ±nd the ground-state electron con±guration for an element with atomic number Z , follow the arrows! (Note exceptions: OGC Fig. 5.17) # of e states Lecture 4, spring 2010
Background image of page 3

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

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/30/2011 for the course EMSE 103 taught by Professor Ggh during the Spring '10 term at Case Western.

Page1 / 17

L04PerTable145s10 - Lecture 4: Atomic Structure & the...

This preview shows document pages 1 - 4. Sign up to view the full document.

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