- Draw an example of a lithium atom. Lithium has 3 protons, 3 electrons and 3 neutrons. label your diagram.
2. Complete the table on the properties of all the sub-atomic particles:
| Name | Size | Charge | Location |
| -1 | |||
| Proton | |||
| Nucleus |
3. Complete the following paragraph. Key words are provided. There are more words than required. You may use a word more than once:
Electrons are __________________ charged and __________________the nucleus. They are very _________________ compared to the _________________ and neutrons. Protons are found in the_____________________ and have a positive_______________. The neutrons have a __________________ charge and are found in the nucleus alongside the________________.
4. Energy levels (orbitals) around the nucleus.
Draw a Sodium atom’s energy levels and add in the correct number of electrons to each energy level. Label your diagram.