[ar] • [he] • Abundance • Albert • Alkaline • Californium • Colored • Cubic • Curie • Days • Density • Earth • Gas • Ghiorso • Grams • High • Highly • Human • Identified • Main • Makes • Mass • Materials • Medical • Medicine • Metal • Mole • Name • Named • Naturally • Newton • Nobelium • Noble • Origin • Pink • Practical • Primary • Produced • Production • Radioactivity • Reactivity • Stable • Symbol • Toxic • Used • Usually • Volatility • Weight • Which • Yellow