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## Ionic Bonding If there is space for electrons then one in the outer shell transfers it's electron. Lithium atom has 1 electron on its outer shell, Flourine has space to take one They combine and transfer electrons. Ions are formed when atoms lose or gain electrons They carry electrical charge,...

## Ionic Bonding If there is space for electrons then one in the outer shell transfers it's electron. Lithium atom has 1 electron on its outer shell, Flourine has space to take one They combine and transfer electrons. Ions are formed when atoms lose or gain electrons They carry electrical charge, either positive or negative. | Group in Periodic Table | Charge on ion | Example | | ------------------------ | --------------- | -------- | | 1 | 1+ | Na+ | | 2 | 2+ | Mg+2 | | 3 | 3+ | Al+3 | | 5 | 3- | N−3 | | 6 | 2− | O2− | | 7 | 1 − | Br− | All metals form positive ions (e.g. lead ion) The number after it tells you how many charges it has Lead (II) contains Pb+2 ion Iron (III) contains Fe+3 ion