Ions!

Charged particles…

Atoms can form ions by gaining or losing electrons

Metals tend to lose one Metals tend to lose one or more electrons to or more electrons to form positive ions called form positive ions called cationscations

Metal ions are usually Metal ions are usually named by using the named by using the name of the parent atomname of the parent atom

The name of the cation The name of the cation shown in this slide is the shown in this slide is the ““Sodium IonSodium Ion””

Atoms can form ions by gaining or losing electrons

Non-metals tend to gain Non-metals tend to gain one or more electrons to one or more electrons to form negative ions called form negative ions called anionsanions. .

These are named by using These are named by using the root of the atom name the root of the atom name followed by the suffix followed by the suffix –ide–ide

The ion shown on this slide The ion shown on this slide is called the is called the Fluoride IonFluoride Ion

We can predict what ions will form

The ion that an atom will form can be predicted The ion that an atom will form can be predicted from the atom’s position on the periodic tablefrom the atom’s position on the periodic table

Metals (on the left hand side of the periodic Metals (on the left hand side of the periodic table) will GIVE UP electrons to form positively table) will GIVE UP electrons to form positively charged charged cationscations

Nonmetals (on the right hand side of the Nonmetals (on the right hand side of the periodic table) will GAIN electrons to form periodic table) will GAIN electrons to form negatively charged negatively charged anionsanions

We can predict what ions will form

Group 1Group 1 atoms form 1+ cations (they lose 1 atoms form 1+ cations (they lose 1 electron)electron)

Group 2Group 2 atoms form 2+ cations (they lose 2 atoms form 2+ cations (they lose 2 electrons)electrons)

Group 7 Group 7 atoms form anions with 1- charges (they atoms form anions with 1- charges (they gain 1 electrons)gain 1 electrons)

Group 6 Group 6 atoms from anions with 2- charges (they atoms from anions with 2- charges (they gain 2 electrons)gain 2 electrons)