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# Ions Charged particles formed are called ions * Ion = Charged particles formed when lose/gain electrons, they can have a negative/positive charge - A positive ion is called a cation (eg. Na+) - A negative ion is called an anion (eg. Cl-) ## Transferring Electrons - Elements in groups 1,2,3 *lose...

# Ions Charged particles formed are called ions * Ion = Charged particles formed when lose/gain electrons, they can have a negative/positive charge - A positive ion is called a cation (eg. Na+) - A negative ion is called an anion (eg. Cl-) ## Transferring Electrons - Elements in groups 1,2,3 *lose their outer shell electrons* to form 1+, 2+, 3+ ions. - Elements in groups 5,6,7 *gain electrons* to form 3-, 2-, 1- ions. * **Diagram** Group 1,2,3 - [Al] (drawing of an aluminum atom with 3 electrons in the outer shell) - 3 electrons removed - [Al]3+ (drawing of an aluminum ion missing the 3 outer electrons) Group 5,6,7 -[N] (drawing of a nitrogen atom with 5 electrons in the outer shell) - 3 electrons added - [N]3- (drawing of a nitrogen with 8 electrons in the outer shell)