Sodium and potassium are metals. They are both in Group 1 of the Periodic Table. That puts them among the most reactive metals in the Periodic Table. Metals are the elements which are most abundantly found among all the elements. Metals are placed on the left side of the periodic table, and further moving up, and to the right, the metallic character decreases. Metals will be:
- High lustre (shiny).
- Metallic appearance.
- Usually solid at room temperature (except mercury).
- Good conductors of electricity and heat.
- High malleable and ductile.
- May have a high melting point.