2.1 Use the following units: ampere (A), coulomb (C), joule (J), ohm (), second (s), volt (V), watt (W).

Units                   Symbol                Measures...
Ampere                   A                        Current
Coulomb                 C**                     Charge
Joule                        J                        Energy*
Ohm                         Ω                       Resistance
Seconds                 sec                      Time
Watt                        W                        Power

**this symbol isn't quite correct because I don't think you can type it...it's a very curly C, google it for a more accurate result.

*Energy is not the same as electricity.