1 Begin with the nucleus of the atom - Draw a circle to represent this
2 The protons and neutrons are found in the nucleus - This information is got from looking at Atomic number and Mass number on the Periodic table. Example: Hydrogen has 1 proton and no neutrons.
3 The electrons are found in the electron shells around the nucleus - Hydrogen has 1 electron
4 The first electron shell can hold a maximum of 2 electrons, the second 8, the third can hold up to 18
5 Check the Group number to see if you have the correct number of electrons in the outer shell. The number of electrons in the outer shell equals the Group number.