Most elements on the periodic table are metals. Out of the 118 known elements, approximately 90 are classified as metals. These metals include alkali metals, alkaline earth metals, transition metals, lanthanides, and actinides.
Metals are characterized by their ability to conduct electricity and heat, their malleability, and their ductility. They typically have a shiny appearance and can form positive ions by losing electrons. Some common examples of metals include iron, copper, gold, and aluminum.
Non-metals and metalloids make up the remaining elements on the periodic table. Non-metals, such as carbon, oxygen, and nitrogen, are generally poor conductors of electricity and heat. Metalloids, like silicon and germanium, have properties that are intermediate between metals and non-metals.