Matter

 
8.1  Matter
 

1. Atom: the smallest particle of an element

2. Molecule: consists of two or more atoms which chemically combined

3. Ion: charged particle

4.

 
Type of substances Explanation and examples
Atomic substances
  • Contain only atoms
  • Atoms in metals arranged in neat and orderly manner

Examples

  • Gold metal
  • Helium atom
Molecule substances
  • Contain molecules made up of two or more atom that combined chemically
  • Atom can be same or different

Examples

  • Non-metallic elements
  • Water molecules
Ionic substances
  • Formed by the reaction between metal elements and non-metal elements
  • Positive ions and negative ions

Examples

  • Sodium chloride