click below
click below
Normal Size Small Size show me how
Chemistry Test Guide
Chemistry Study Guide: Covalent & Metallic Bonding
Question | Answer |
---|---|
covalent bonding | electrostatic attraction between a positively charged nucleus & a shared pair of electrons |
properties of covalent compounds | depends on size & polarity of molecule; can be solids, liquids, or gasses at room temp.; tend to have lower melting/boiling points |
non polar | equal distribution of electrons |
polar | unequal distribution of electrons |
Lewis structure | represents the chemical bonds & valence shell electrons in a molecule |
intermolecular forces | force that mediates interaction between molecules; forces between 2 molecules |
metallic bonding | electrostatic attraction by the positively charged nuclei & a "sea of delocalized electrons" |
properties of metallic bonding | luster (shiny), ductile (can be pulled), malleable, thermal conductivity, high melting/boiling points, conducts electricity because of freely moving positively charged particles |
allays | mixture of metal + different metal or metal + nonmetal; changes physical properties usually makes metal stronger |
What is polarity determined by? | difference in electronegativity 0-0.3 = nonpolar 0.4-1.7 = polar > 1.7 = probably ionic |
sign used to show partial positivity and partial negativity | δ+ and δ- |