Chemistry topic 1 (the basics)

Chemistry topic 1 (the basics)

1. Atoms.

   • contain protons +, neutrons 0 and electrons -
     • The nucleus contains just protons and neutrons. electrons move around in shells.
   • number of protons= number of electrons.
   • how are the elements show on the periodic table? click on the link to find out!

2. Elements.

   • Atoms are represented by symbols: C=Carbon, O=Oxygen, Mg= Magnesium
   • 100 (ish) elements.
   • Elements consist of atoms.