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| Front | Why can you not just add the relative masses of the subatomic particles to work out the relative mass of an isotope? |
| Back | The strong nuclear force holding together protons and neutrons in the nucleus cause a loss of a fraction of their mass, with the mass lost called the mass defect |
| Front | Define dipole |
| Back | Dipole - a charge separation across a bond with one atom having a partial positive charge and one atom with a partial negative charge |
| Front | When do alkanes react with halogens? |
| Back | Alkanes react with halogens in the presence of sunlightThe high-energy ultraviolet radiation (UV) present in sunlight produces the initial energy for a reaction to take place |