Handout-04 - then, distribute the remaining e- in best...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Chemistry 111 Fall, 2005 Prof. Simpson Chemistry 111 Handout #4 Lewis Dot Structures Octet Rule. Distribute e- in a molecule so that all atoms have/share a total of 8 valence e- Note: there are lots of exceptions! odd # of valence e-, less than 8 valence e-, expanded valence configurations Drawing a Lewis Dot Structure … The Basic Steps 1. Computer the total number of e- available to distribute in the Lewis Dot Structure = the sum of valence e- in the atom = Σ (valence e-) 2. Write the molecule down in an arrangement that shows the bonding relationships … we know this, or we make an informed guess. the least electronegative atom is usually in the center 3. Distribute the e- pairs: •• first, put an e- pair between each set of bonded atoms
Background image of page 1

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

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: then, distribute the remaining e- in best compliance possible with the octet r u l e Example 1. Cl 2 step 1 . Total valence e- available = (2 Cl atoms) x (7 valence e- per Cl) = 14 valence e- step 2 . Cl Cl step 3 . Cl Cl one e- pair between atoms = bond 12 e- pairs left to distribute step 4 . Cl Cl Lewis dot structure of Cl 2 each Cl atom has or shares 8 valence e- each Cl atom "feels" a bit like a noble gas bonding pair of electrons lone pairs there are 6 lone pairs in Cl 2 there are 12 lone pair e- in Cl Chemistry 111 Fall, 2005 Prof. Simpson Example 2. CH 4 Example 3. NH 4 + Example 4. CH 3-Example 5. PF 5...
View Full Document

This note was uploaded on 02/08/2010 for the course CHEM 111 taught by Professor Kenney during the Spring '08 term at Case Western.

Page1 / 2

Handout-04 - then, distribute the remaining e- in best...

This preview shows document pages 1 - 2. Sign up to view the full document.

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