* Groups 1 and 2: These are the alkali metals and alkaline earth metals, respectively. All elements in these groups are metals.
* Groups 3-12: These are the transition metals. They are all metals, with some exceptions like mercury (Hg) which is a liquid at room temperature.
* Lanthanides and Actinides: These two rows at the bottom of the periodic table are all metals.
Non-metals are mostly located on the right side of the periodic table. There are some exceptions, such as metalloids (sometimes called semimetals) which have properties of both metals and non-metals and lie along a diagonal line between metals and non-metals.
