“What are the actinide elements?”

As we continue throughout our tour of the periodic table, we approach a most virulent group of chemicals known as the actinides. All of the actinides have relatively high density, plasticity, and level of radioactivity. The elements that make up the actinide metals include actinium [Ac], thorium [Th], protactinium [Pr], uranium [U], neptunium [Np], plutonium [Pu], americium [Am], curium [Cu], berkelium [Bk], einsteinium [Es], Fermium [Fm], Mendelevium [Md], nobelium [No], and lawrencium [Lr]

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