1. Elements, Compounds and Mixtures
A little history...
For thousands of years, people have believed that matter is made of elements. Aristotle and other Greek philosophers, who lived about 2400 years ago, believed that matter is made up of four elements – earth, fire, water and air.
What Is An Element, Mixture And Compound?
Learn the basics about what is an element? how is a mixture done? and what is a compound? Find out in this video!
Beaker
BEAKER is an app that turns your mobile device into, well, a beaker where you can explore chemistry anywhere, anytime. Explore 150 chemicals from liquid, solid to gas.
2. Models and Representations of Elements, Compounds and Mixtures
What Is An Element, Mixture And Compound?
Suitable for Secondary 1 Lower Secondary Science Chemistry
​
At the end of this video, you should be able to:
1) Use and interpret models that represent elements, compounds and mixtures
2) Determine the number and types of atoms from the chemical formula
3) Write chemical formula based on models and vice versa
3. Rate of Dissolving and Solubility
Factors Affecting Rate of Dissolving and Solubility
At the end of this video, you should be able to:
1) Describe the factors affecting rate of dissolving.
2) Define the term solubility.
3) Describe the factors affecting solubility.