HomeElement listsEra of discoverySynthesis and nuclear sciences (1950–1999)

Era of discovery: Synthesis and nuclear sciences (1950–1999)

After 1950, many new, non-naturally occurring elements (the transuranics) were synthesized partly in nuclear reactors, partly in particle accelerators. Such elements are characterized by instability and radioactive decay.

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

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Enlightenment (until 1799)Element classification (1850–1899)Technical and industrial revolution (1800–1849)Antiquity to Middle Ages Early quantum theories (1900–1949)Synthesis and nuclear sciences (1950–1999)Recent synthesis (since 2000)