1. Writing and Naming Ions
Monday, January 8th, 2018

2. Ion – an atom that has gained or lost electrons, formed when electrons are exchanged in the formation of an ionic compound.
There are 2 Types of Ions
Monoatomic ion – a single atom that has gained or lost  electrons
Polyatomic ion – a group of bonded atoms that have gained or lost electrons
Na+ Cl- O-2
NH4+ OH- CO3-2
In either case the # protons do not = # electrons

4. ....Clarification of symbol numbers!
OK Lets not get confused
....Clarification of symbol numbers!
Chemical Symbol
Nuclear symbol
Ion symbol
Chemical Formula

5. Cation – formed when a neutral atom loses one or more electrons
Two (2) Types of Monoatomic Ions
Cation – formed when a neutral atom loses one or more electrons
Ex) Lithium atom (Li)  becomes the Lithium
ion (Li+) when it loses 1 electron
Ex) Calcium atom (Ca)  becomes the Calcium
ion (Ca+2) when it loses 2 electrons
What would Aluminum do?

6. Anion – formed when a neutral atom gains one or more electrons
Two (2) Types of Monoatomic Ions
Anion – formed when a neutral atom gains one or more electrons
Ex) Chlorine atom (Cl)  becomes the Chloride
ion (Cl-) when it gains 1 electron
Ex) Oxygen atom (O)  becomes the Oxide ion
(O-2) when it gains 2 electrons
What would Nitrogen do?
Whoa....gain e- are negative and loss of e- are positive?!?!?!

7. Happiness is a full outer shell.

8. Polyatomic ions – act as a group in compounds
Ex) Ammonium ion (NH4+)
Ex) Sulfate ion (SO4-2)
Transition metal ions (a special case of Cations) – they can form more than one type of ion. (YIKES)
Ex)  Iron (II) ion  Fe+2     
Ex)  Iron (III) ion  Fe+3

9. What would be the Ion?
Beryllium:
Sulfur:
Copper (II) Ion:

10. Beryllium: Be+2 Sulfur: S-2 Copper (II) Ion: Cu2+
What would be the Ion?
Beryllium: Be+2
Sulfur: S-2
Copper (II) Ion: Cu2+

11. Rules for Naming Ions: Cations
1.  For a monoatomic cation, write the name of the atom followed by the word ion
Ex)  Li+1        Lithium ion
Ex) The ion formed by the calcium atom would be the Calcium ion
2. For polyatomic cations, write the name as memorized from the ion sheet:
Ex) NH4+1  -- Ammonium ion
3.  For Transition metal cations, write the roman numeral equal to the charge between the name of the atom and the word ion
                                    Ex)  Fe+3        Iron (III) ion

12. You MUST include the word ion otherwise you will not know if you are referring to an atom or not!!!

13. Rules for Naming Ions: Anions –
For a monoatomic anions, write the name of the atom but change the ending to “-ide”, followed by the word ion
Ex) N-3 Nitride ion
Ex) The ion formed by the sulfur
atom would be sulfide ion
2.  For a polyatomic anions, write the
name as memorized from the ion
sheet OH-  Hydroxide ion

14. a)  nitrate ion 
Br –
Chloride ion
d) Cu2+ 

15. a)  nitrate ion  NO3- 
Br –  Bromide ion
Chloride ion  Cl-
d) Cu2+   Copper (II) ion

16. There are 9 Polyatomic Ions You NEED to MEMORIZE – Make FLASHCARDS!
The are circled on your green sheet – you must know the formula and the name for each.
Ammonium
Nitrate
Acetate
Carbonate
Cyanide
Sulfate
Bicarbonate
Phosphate
Hydroxide
You will be quizzed on the 9 on Tuesday, January 16th!