Lesson 4.3.1-4.3.2 Atomic structure and chemical bonding, Ionic bonding

• Chem
• Secondary Education
• Age 13

Lesson 4.3.1 | Atomic structure and chemical bonding

Lesson 4.3.2 | Ionic bonding

Today's Lesson Goals

• recall the atomic structures of some elements 
• describe the formation of ions through drawing diagrams
• explain how an ionic bond is formed

Enquiry question: 

Sodium is very reactive and unstable. Is it possible for it to become stable? Explain if you can.

Drawing a diagram

Understanding key concepts

Atomic structure

highest energy level / outermost electron shell

• atomic number = number of protons
• number of protons = number of electrons
• electron charge = - 1
• proton charge = +1
• electron + proton charges = overall charge of atom
• electrostatic forces = keep electrons in place

Remember!

Stable

Unstable

Unstable atoms = REACTIVE

Remember!

Unstable atoms = NOT FULL OUTER SHELL

Remember!

Enquiry question: 

All unstable atoms have incomplete electrons in their outer shells. 

What must these atoms do to become stable? How?

unstable

stable

unstable

stable

unstable

unstable

formation of a compound (water)

unstable

stable

stable

stable

stable

stable

stable

chemical bond

Enquiry question: 

How is a chemical bond formed? 

unstable

stable

Losing electrons to become stable.

loses an 

electron

unstable

stable

Gaining electrons to become stable.

unstable atoms

stable ions

Ionic bonding : a type of chemical bonding between a metal and a non-metal

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Collaborative Work

COLLABORATIVE TEAMS

Team 1

Moniroth

Yali

Korng

Nary

Team 2

Nich

Kateka

Kimsuor

Team 3

Colawin

Rita

Vennessa

Team 4

Ponnareay

Phimean

Nalin

Team 5

Kimmeng

Keriya

Neath

Quick Task: Instructions

• Given an element,  draw a diagram to show the formation of a lithium ion or a fluoride ion. 
• Post your work on the whiteboard.