CHEM 1040 Lecture Notes - Lecture 5: Sigma Bond, Sodium Chloride, Electron Affinity

76 views4 pages
CHEM*1040- Lecture 5- Electronegativity and Chemical Bonding
Electronegativity
Electronegativity was introduced to compare all elements in the periodic table
o Ionization energy is only useful to compare elements that are likely to lose
electrons
o Electron affinity is only useful to compare elements that are unlikely to lose
electrons
It measures the tendency of an atom to gain electrons
o Low electronegativity = unlikely to gain electrons
It was developed by assigning a value of 1.0 to lithium, and assigning numbers to all
other elements relative to lithium’s bonding habits.
Electronegativity Increases
Electronegativity Decreases
Chemical Bonding
Chemical bonding requires bonds in which atoms share electrons
Called covalent bonds
Polar vs. Non- Polar Bonds
The difference in electronegativity between the atoms determines the type of bond
Unlock document

This preview shows page 1 of the document.
Unlock all 4 pages and 3 million more documents.

Already have an account? Log in

Document Summary

Electronegativity: electronegativity was introduced to compare all elements in the periodic table. Ionization energy is only useful to compare elements that are likely to lose electrons: electron affinity is only useful to compare elements that are unlikely to lose electrons. It measures the tendency of an atom to gain electrons: low electronegativity = unlikely to gain electrons. It was developed by assigning a value of 1. 0 to lithium, and assigning numbers to all other elements relative to lithium"s bonding habits. Chemical bonding: chemical bonding requires bonds in which atoms share electrons, called covalent bonds. Polar vs. non- polar bonds: the difference in electronegativity between the atoms determines the type of bond. H2: you can use elements" positions in the periodic table to compare the polarity of different atoms. C-i will be more polar because iodine is farther away from carbon on the periodic table than chlorine.

Get access

Grade+
$10 USD/m
Billed $120 USD annually
Homework Help
Class Notes
Textbook Notes
40 Verified Answers
Study Guides
Booster Classes
Class+
$8 USD/m
Billed $96 USD annually
Homework Help
Class Notes
Textbook Notes
30 Verified Answers
Study Guides
Booster Classes