- Describe the differences between elements, compounds and mixtures.
A substance made up of only one type of atom is called an element.
A substance made of two or more different types of atoms is called a compound.
A mixture contains two or more elements or compounds that are not chemically bonded together.
- Demonstrate understanding of the concepts of element, compound and mixture.
Hydrogen, Oxygen, Calcium, Aluminium, Iron are all elements since they only contain their respective atoms.
Water (H2O) is a compound since it contains atoms of both hydrogen and oxygen.
When sand and iron powder is mixed, it is called a mixture since there is no chemical reaction between the both; the elements or compounds in a mixture still have their characteristic properties- there is no change.
Notes submitted by Lintha
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