Group: Actinides

All elements of the actinides are radioactive heavy metals. Due to the energy released during radioactive decay, their use in nuclear reactors and atomic weapons is significant.

89Ac

Actiniumsilvery-white, glowing with an eerie blue light; sometimes with a golden cast

90Th

Thoriumsilvery

91Pa

Protactiniumbright, silvery metallic luster

92U

Uraniumsilvery gray metallic; corrodes to a spalling black oxide coat in air

93Np

Neptuniumsilvery metallic

94Pu

Plutoniumsilvery white, tarnishing to dark gray in air

95Am

Americiumsilvery white

96Cm

Curiumsilvery metallic, glows purple in the dark

97Bk

Berkeliumsilvery

98Cf

Californiumsilvery

99Es

Einsteiniumsilvery; glows blue in the dark

H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn Fr Ra Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No Lr Rf Db Sg Bh Hs Mt Ds Rg Cn Nh Fl Mc Lv Ts Og