Unit 4 - Chemical Bonding and Structure

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UNIT 4

• Bond length v strength

• Bond polarity: even if they are different, it can still be nonpolar because of EN. 0.5, 1.8

• Coordinate cov, incomplete octet, expanded octet, radicals

• Drawing lewis structures

→ allotropes: different forms of elemental things

• VSEPR and shapes

• IMFs

  • LDFs

  • Dipole dipole

  • Dipole induced dipole

  • Hydrogen bonding (NOT VAN DER WAALS)

  • Ionic bonding (NOT VAN DER WAALS)

• In group 1, mp decreases down group lower charge density, in group 7, increases down because more LDFs

→ alloys: mixtures of metals

• Sigma bond = single bond, 1o 1p = double bond, 1o 2p = triple bond

• Formal charge

→ O3 to O2 and Orad, and O2 + Orad to O3 or O3 + Orad to 2O2

• Hybridization: determines the ELECTRON DOMAIN geometry of the atom