Ions When atoms lose or gain electrons. Proton = + charge Neutron = neutral charge Electron = - charge Structure of an Atom.

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Presentation transcript:

Ions When atoms lose or gain electrons

Proton = + charge Neutron = neutral charge Electron = - charge Structure of an Atom

Ions Ions are atoms that have lost or gained one or more electrons giving them a positive or negative charge!

For example: Na (Sodium), has originally 11 electrons but when an electron is lost it becomes a postive ion. Na + If an ion losses an electron it has a positive charge. If an ion gains an electron it has a negative charge. Ions

What causes an atom to become an ion? When an atom loses or gains one or more electrons it acquires a net electrical charge called an ion. The net charge of an ion is found by subtracting the number of electrons from the number of protons Charge of Ion = number of protons – number of electrons Repeat Ions!

A neutral magnesium atom (atomic number=12) has 12 protons/electrons. If it loses 2 electrons it becomes an ion with a charge of 2+. Number of protons 12 Number of electrons - 10 Charge of Ion 2+ Lets give it a try

29. Cu²+ 9. F Ion Protons Electrons Examples

You Try Cl -1 18