The Periodic Table and Atomic Structure

The Periodic Table and Atomic Structure

1. The simplest substances are called elements

   • They are arranged to for the periodic table
   • Arranged by atomic number

2. Atoms

   • Make up everything
   • Made up of: neutron, protons and electrons

3. Ions

   • When an atom loses or gains electron to form a full outer shell and get a charge

4. A compound is a substance of more than one element with chemical bonds

   • When elements combine to make a compound, they do so in fixed ratios
     • e.g water is always 2 parts hydrogen and 1 part oxygen

5. Mixture is a substance of more than one element without chemical bonds

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