Glossary of Chemistry- Molecular geometry

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Chemical bonds
strong force of attraction btwn. atoms
Ionic bonds
donation of electrons btwn. m+nm
collection ionic bonds
Covalent bonds
shareing of elect. btwn. nm+nm
collection of covalent bonds
structual formulas
2-D representation of bonding of ionic or covlent substances
Lewis dot struct.
represents ionic/cov. subs.
w/ dashes (bonds) dots (electrons) element symbols
diff. represents shareing of electrons
- greater diff. more un= shareing
0-0.4= non-polar bond, 0.5-2.0 polar bond region, 2.0-4.0 ionic
polar covalent bonds
unequal shareing electrons ex. HCl 2.1-3.0 =0.9
dipole right
Resonance structures
same structula formula diff. bonds or loin pairs
reduced octet
only need 2,4,6 electrons to be complete H, Bo, B
expanded octet
Can hold more than 8... 10,12
only elements n=3(3rd per.) Si, P S, As, Kr, Xe
Vsepr- Valence shell electron
pair repulsion Theory
electrons try to move as far from each other as they can

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