Sodium, potassium, calcium, magnesium, manganese and chromium are some examples of metallic elements. More than 90 of the 118 known elements are considered metals.
Some of the other elements classified as metals are barium, tin, aluminum, zinc, rhodium, silver, gold, cadmium, lead, iron, copper, cobalt and nickel.
Several different groups of metallic elements are on the periodic table. They include the alkaline earth metals, alkali metals, rare earth elements and transition metals. Metals also share several different characteristics. They resist corrosion and act as good conductors of electricity and heat. Metals are also shiny and hard. Metals are used to make jewelry, tools, coins, weapons and other products.