chemical bond

• chemical bond

  • ionic bonding
  • metallic bonding
  • covalent bond
    • polar covalent bond
    • non-polar covalent bond

• polarity

  • of bond:
    • $\Delta \chi \gtrsim 1.7$ → predominantly ionic bond
    • $0.4\lesssim \Delta \chi \lesssim 1.7$ → polar covalent bond
    • $\Delta \chi \lesssim 0.4$ → nonpolar covalent bond
  • of molecule:
    • if it has no lone pair (on the central atom) and where all terminal atoms are the same, then it is nonpolar
    • if it has one lone pair (on the central atom), then it is polar
    • if it has two or more lone pair (on the central atom), then it is usually polar
    • if it is made up of only carbon and hydrogen (hydrocarbons), then it is non-polar

• partial charge (or net atomic charge)

  • $\delta +$ and $\delta -$

• single bond

• double bond

• triple bond

• bond order

• bond energy (BE)

• bond length (or bond distance)

  • $\text{bond length: triple}<\text{double}<\text{single}$

• isomers

• intermolecular force (IMF)

• intramolecular force