Dalton's Atomic Theory

Lesson Title: Dalton’s Atomic Theory

Learning Outcome:
At the end of the sessions, you must be able to:
1. Enumerate and explain the four assumptions made by John Dalton.
2. Explain the laws of chemical changes in terms of Dalton’s Atomic Theory.

Learning Presentation:
You have meet John Dalton previously, and as you have known he is the forerunner of today’s atomic theory, let us look closely his contributions click here

Another great references to have a full understanding of the contributions he made to the atomic theory is your textbook its on page 57 ;)

Generalization:
The four assumptions of John Dalton in his “Atomic Theory of Matter:
1. Each element is composed of tiny particles called atoms.

2. All atoms of a given element are identical; atoms of different elements are different and have different properties (e.g. masses).

3. Atoms of an element are not changed into different types of atoms by chemical reactions; atoms are neither created not destroyed in chemical reactions.

4. Compounds are formed when atoms of more than one element combine; a given compound always has the same relative number and kind of atoms.

Assignment:
What do you think is the most important contribution of Dalton in the atomic theory formulation, is his theory still applicable today? How?
Send your answer by clicking here

Evaluation:
Click here to evaluate yourself, a score of more than 70% means excellent understanding of the lesson