This document provides information about ionic bonding between atoms. It describes how ions are formed when atoms transfer electrons to obtain full outer electron shells. Sodium loses an electron to become sodium ion (Na+), and chlorine gains that electron to become chloride ion (Cl-), forming an ionic bond in sodium chloride (NaCl). Other examples of ionic bonding covered are beryllium fluoride (BeF2) and practice drawing Lewis structures for LiCl, K3N, BaS, and CaF2. The overall purpose is to explain how ionic bonds are formed through the transfer of electrons between atoms to achieve stable full outer shells.

1. Chemical Bonding:
Ionic Bonding

2. Jan Kevin B.
Mueller
Student Teacher

3. Learning Objectives:
• describe the arrangement of
atoms in a metal and in a nonmetal;
• understand how bonds are formed
between metals and non-metals.
At the end of the lesson, the students will be
able to:

4. Questions:
• What gives and what takes the
electrons?
• Why the ions are charged?
• How can we show the electron
structure of each ion and how the
electrons are shared?

5. How do atoms bond(join) together to form the millions
of different compounds that make up the world?
It all comes down to the electrons!

6. What is a Bond?
• It is the force of attraction that exists
between two atoms (or ions) as a result of:
• The loss and gain of electrons to form oppositely
charged ions
• The equal sharing of one or more pairs of electrons
between two atomic nuclei
• The unequal sharing of one or more pairs of
electrons between two atomic nuclei

7. There are many ways electrons can interact
with one another:
• Electrons can be transferred between atoms
Ionic Bonding
• Electrons can be shared between atoms
Covalent Bonding

8. Ionic Bonding

9. VIDEO CLIP
• Watch the clip of sodium reacting with chlorine. What
is the product?

10. SODIUM CHLORINE
• What happens when they react?
• SODIUM + CHLORINE  SODIUM
CHLORIDE

11. Why do atoms BOND?
• Atoms bond to get full outer
shells.

12. Here comes my friend, Sophie Sodium
Hey Johnny. I’m in Group 1 so I have one
electron in my outer shell. This electron
is far away from the nucleus so I’m quite
happy to get rid of it. Do you want it?
Cl
Now we’ve both got full outer shells
and we’ve both gained a charge.
We’ve formed an IONIC bond.
Na
Okay
Cl
Na
+ -
Hi. My name’s Johnny Chlorine.
I’m in Group 7, so I have 7
electrons in my outer shell

13. Electron shells and bonding
• Atoms are only “happy” when their outer shell is full
• They will either lose or gain electrons in order to
become “happy”
• If they lose electrons they become positive ions (the
number of protons is bigger than the number of
electrons)
• If they gain electrons they become negative ions (the
number of protons is smaller than the number of
electrons)

14. Ionic bonding
E.g. Sodium + Chlorine → Sodium
chloride
Na Cl
Outer shells not full!
Unhappy atoms 

15. Ionic bonding
E.g. Sodium + Chlorine → Sodium chloride
Na Cl
NaCl (Na+Cl-)
Both ions have full outer shells – happy
atoms! 

16. Beryllium fluoride - BeF2
• Each beryllium atom need to loose two
electrons, but each fluorine only needs 1
Be
2+
F
F

18. Ionic Bonding Practice
• Draw Lewis Dot Structures for:
– LiCl
– K3N
– BaS
– CaF2