Compund and mixtures

Welcome back again! Today, we will be talking about compound and mixtures. Button your seats belts and let's rock and roll!

What is a compound?

• is a substance consisting of two or more elements chemically combined together.
  

Examples of compounds:
1. Sodium Chloride Elements: Sodium Chlorine
2. Water Elements: Hydrogen, Oxygen
3. Copper (||) sulfate Elements: Copper, Sulfur, Oxygen
4. Carbon dioxide Elements : Carbon, Oxygen

Characteristics of Compounds:

• has different properties that are different from the properties of its constituent elements
• when compound is formed, there is usually an exchange of energy (in form of heat energy or light energy or both) with their surroundings.
  
• can only be broken down into simpler substances by chemical methods, such as decomposition by heat energy , exposure to light or passing through electric current through it.
• the different elements in a compound always join together in a fixed proportion by mass.

What is a mixture?

• consists of two or more substances not chemically combined together.
  

Examples of mixtures:

1. Blood
   
2. Soil
3. Air
4. Sea water
5. Aerated water

Characteristics of Mixture

• has the properties of its components
• when mixture is produced, little or no energy in the form of heat energy or light energy is given out or taken in.
• can be separated into its components by physical methods like using a magnet, evaporation, filtration and distillation
• can be mixed in any proportion by mass
  

Now, together with the previous lesson. We shall see the differences....

Differences between element, compound and mixture:
Elements Compound
-made up of only one atom -different elements in a compound
- simplest pure substance -combine in a fixed proportion by mass
-have properties similar to -a chemical change takes place when compound is formed
their atom - has properties which are different from its constituents elements
-cannot be broken down - can only be broken down by chemical methods like heating

Mixtures
-components in a mixture are not mixed in any fixed proportion
-no chemical reactions takes place when mixture is formed.
-mixture has properties of substances of which it is made.
-can easily be separated by physical methods like using a magnet

Okay, that's all for today! Hope you have learn something useful today! Enjoy! And remember to tune in for the last lesson of this season!!! Enjoy!(: