Transuranium elements

Uranium is the last element occurring in nature. The elements coming after uranium are called transuranium elements. They are all synthetic in nature and are man made. They are radioactive and most of them have short half lives.

For example :-

²³⁸U₉₂ + ¹n₀ → ²³⁹ U₉₂ → ²³⁹ Np₉₃ + ⁰e_-1

Uranium → Neptunium

²³⁹ Np₉₃ → ²³⁹ Pu₉₄ + ⁰e_-1

Neptunium → Plutonium

( Here the Uranium(238,92) is abundant and non fissionable, It can be made into fissionable by reaction given above )

The element beyond actinides in the periodic table form atomic number 104 to 112 are called transactinide elements. These elements are rutherfordium (Rf), dubnium (Db), Seaborgium (Sg) etc. The nuclear reactions for the preparation of some of the transactinide elements are given below.

²⁴⁹Cf₉₈ + ¹²C₆ → ²⁵⁷Rf ₁₀₄+ 4 ¹n₀

Californium → Rutherfordium

²⁴⁹Cf₉₈ + ¹⁵N₇ → ²⁵⁷Db ₁₀₄+ 4 ¹n₀

Californium → Dubinium

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