A Actinide is a heavy element. They include Amaricium, Seaborgium, Uranium, Neptunium, Plutonium etc.
“This template may take a long time to complete. We will be using all the infoboxes on the wiki...Berkelium
“Thorium is a silvery metal located in the f block. Its classified as a actinide. Could be used...Thorium
“Mendelevium is a element in period 7 that is a actinide. It is named after Dmitri Mendeleev, the...Mendelevium