| Front | Define flame test |
| Back | Qualitative test used to identify metal ions (cations). Carried out by inserting a nichrome wire loop with the unknown compound on into a flame and observing the colour. |
| Front | Define element |
| Back | A substance made up of only one type of atom. |
| Front | Define sacrificial protection |
| Back | The protection of iron or steel against corrosion by using a more reactive metal. Zinc is often used as a sacrificial metal. Sacrificial protection creates a physical barrier to oxygen and water, preventing corrosion of the metal. |