Lacey_Che131_F2011_Lect-25

Lacey_Che131_F2011_Lect-25 - Lec-25: Periodic Trends Lec...

Info iconThis preview shows pages 1–5. 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
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Lec-25: Periodic Trends Lec 25: Periodic Trends Roy A. Lacey, Stony Brook University; Che 131, Fall 2010 1 Electron Configurations Electrons enter and fill orbitals according to four rules: Pauli Exclusion Principle Orbitals can contain a maximum of two electrons which must be of opposite spin. Aufbau or Build-up Principle Electrons enter and fill lower energy orbitals before higher energy orbitals. Hund's Rule electrons will enter the orbitals one- at-a-time to maximize degeneracy Madelung's Rule Orbitals fill with electrons as n + l Electrons can not have the same four Roy A. Lacey, Stony Brook University; Che 131, Fall 2010 2 quantum numbers Electron Configurations Electron configurations are reflected in the layout of the periodic table Roy A. Lacey, Stony Brook University; Che 131, Fall 2010 3 The electron configuration for Ca is ? Ca Ca [Ar Ar]4s ]4s 2 1s 1s 2 2s 2s 2 2p 2p 6 3s 3s 2 3p 3p 6 6 4s 4s 2 2 Roy A. Lacey, Stony Brook University; Che 131, Fall 2010 4 Periodic Table Roy A. Lacey, Stony Brook University; Che 131, Fall 2010 5 Periodic Table Roy A. Lacey, Stony Brook University; Che 131, Fall 2010 6 Periodic properties reflect electronic structure Periodic Trends ` The size of an atom influences both physical and chemical properties....
View Full Document

This note was uploaded on 11/18/2011 for the course CHE 131 taught by Professor Kerber during the Spring '08 term at SUNY Stony Brook.

Page1 / 11

Lacey_Che131_F2011_Lect-25 - Lec-25: Periodic Trends Lec...

This preview shows document pages 1 - 5. Sign up to view the full document.

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