< AP Physics C
Fundamentals of Electric Charge
- Intrinsic to fundamental particles
- 2 types: positive (+), negative (-)
Positive - Lack of electrons Negative - More electrons No charge = Neutral
Same charges repel: + and + or - and - Opposite charges attract: + and -
- Coulomb: Measurement of the amount of electric charge (similar to moles in chemistry)
| Atomic Particle | Mass | Charge |
|---|---|---|
| Neutron | 1.675 * 10−27 kg | 0 C |
| Proton | 1.673 * 10−27 kg | 1.602 * 10−19 C |
| Electron | 9.11 * 10−31 kg | -1.602 * 10−19 C |
Atomic Notation
- A = Atomic mass = # protons + # neutrons
- Z = Atomic Number = # protons
- E = element symbol (like U for Uranium)
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