1. IONS

3. DEF: Atom charges electrically. TYPE OF IONS: an electron or electrons from an atom gives aCations: Gain an electron or electrons from an atom gives a positive charge Lose an electron or electrons to an atom gives aAnions: Lose an electron or electrons to an atom gives a negative charge.

4. IONS The charge in the superscript Examples: Na + Ca +2 I - O -2 Na Ca I O Na Ca I O

5. IONS DEF: Atom charges electrically. NEGATIVE ION OR ANION: An atom which gains electrons gets negative charge and becomes a negative ion.

6. NEGATIVE ION EXAMPLE

7. The symbol “-” is written as an superscripts to indicate the chlorine ion has a charge of 1-

8. NAMING ANIONS A non-metal that has gained electrons to become an ion has the same name as the element but with the ending changed to –ide Ex: Cl - chloride ion

9. NAMING ANIONS

11. IOINS POSITIVE ION OR CATION An atom which loses electrons gets positive charge and becomes a positive ion.

12. POSITIVE IOIN EXAMPLE

13. POSITIVE ION EXAMPLE The symbol “+” is written as a superscripts to indicate the sodium ion has a charge of 1+

14. POSITIVE ION EXAMPLE

15. Naming cations

16. For example: Cu + is named copper (I) read as “cooper one” Cu 2+ is named copper (II) read as “cooper two” Only multivalent metals have Roman numerals in their names.

17. Cat+ions are