2. + + + + + + + + + + + Electron: negative charge Proton: positive charge Neutron: no charge Nucleus: housing for neutrons - - - - - - - - - - - - +

3. C C H H H H C H H C C C Key H: hydrogen atom C: carbon atom This is a molecule of Benzene as it is a combination of different atoms from different elements. It has six Carbon atoms, and six Hydrogen atoms.

4. C C H H H H H H Key C: carbon atom H: hydrogen atom This is a molecule of Ethane as it is a combination of different atoms from different elements. It has two Carbon atoms, and six Hydrogen atoms.

5. S O O O O H H