1. 2.1 Ionic Bonding

2. BOND
JAMES
Chemical Bonds
Taken not shared

3. Learning Goals By the end of this lesson you will be able to:
Define what an ionic bond is
Be able to react a metal and a non-metal to create an ionic bond
Describe properties of ionic compounds

4. What is a Compound?
A molecule that contains 2 or more atoms of different elements.
There are two types of compounds.

5. Ionic bonds – To be reviewed TODAY! 
Covalent bonds – Soon! 

6. Full electron shells
Atoms of noble gases, group 8, have completely full outer shells. This makes them very unreactive or stable.
2nd shell holds a maximum of 8 electrons
1st shell holds a maximum of 2 electrons
3rd shell holds a maximum of 8 electrons

7. Atoms and electron changes
Every atom would like to have a full outer shell like the noble gases.
Atoms can get full outer electron shells by either gaining or losing electrons

8. From atoms to ions
How can reactive metal atoms become stable positive ions?

9. Ionic Bonds: One Big Greedy Thief Dog!

10. Making sodium chloride – table salt!!!
Bonding: example 1
Making sodium chloride – table salt!!!

11. What would a chlorine atom have to do to have a stable electron configuration like a noble gas?
It will have to gain an electron!!!

12. What would a sodium atom have to do to have a stable electron configuration like a noble gas?
It will have to lose an electron!!!

13. Can you think of a way that chlorine could gain an electron and sodium could lose an electron?

15. Sodium gives an electron to chlorine!!!

16. Once this happens both of the atoms will now be ions and will each have a charge!!

17. The oppositely charged ions attract each other and form an ionic bond!!

19. An ionic bond is formed when ions that have opposite charges attract
Key definitions
An ionic bond is formed when ions that have opposite charges attract

20. Formation of an ionic bond

21. Ionic lattices + - - + - - - + + + - + + - - - - + + + - - - + + + - -
In an ionic compound, millions and millions of ions are packed all joined by ionic bonds – this is a crystal lattice + - - + - - - + + + - + + - - - - + + + - - - + + + - - - + + + - - - + + +

22. Making Magnesium oxide
Bonding example 2
Making Magnesium oxide

23. What would magnesium need to do to get a stable full outer shell?Mg

24. What would oxygen need to do to get a stable full outer shell?

25. Magnesium gives two electrons to oxygen!
Can you think of a way that Magnesium could lose two electrons and oxygen could gain two electrons? Mg O

26. Once this happens the Magnesium and Oxygen atoms each get charge and become ions of opposite charge2- Mg 2+
2.8.2
[2.8]2+
2.6
[2.8]2-

27. Magnesium oxide: part 2 O
The positive magnesium ions and the negative oxygen ions are strongly attracted to each other and form an ionic bond. Mg +2 O -2

28. Ionic lattices + - - + - - - + + + - + + - - - - + + + - - - + + + - -
In an ionic compound, millions and millions of ions are packed together in a regular cubic arrangement, joined by ionic bonds.. + - - + - - - + + + - + + - - - - + + + - - - + + + - - - + + + - - - + + +

29. Formation of an ionic bond

30. MONOTOMIC IONS FORMING IONIC BONDS
Example #1:
React the following atoms to form an ionic bond Ca and Br
Example #2:
React the following atoms to form an ionic bond Al and O

31. Multiple-choice quiz