Ions
Ion
- A positively or negatively electrically charged particle
- An atom or group of atoms which has lost (or gained) one or more electrons
- When an atom loses one or more electrons, it becomes a positively charged ion
- When an atom gains one or more electrons, it becomes a negatively charged ion
- An ion may contain MORE THAN ONE TYPE OF ATOM
- eg. NO3-
- (a Nitrate Ion)
- An ion may possess MORE THAN ONE UNIT OF CHARGE (either negative / positive)
- eg. Al3+ , O2-, SO42-
- repsectively an Aluminium ion, an Oxygen ion and a Sulphate ion