d and f Block ElementshardNUMERICAL

The transuranic elements begin immediately after Uranium in the periodic table. What is the precise d and f Block Elements Chemistry Question

Question

The transuranic elements begin immediately after Uranium in the periodic table. What is the precise atomic number ($Z$) of the very first element belonging to this artificially synthesized "transuranic" series?

Answer: 93

💡 Solution & Explanation

Uranium ($U$) has an atomic number of $92$. The elements that follow Uranium are termed transuranic because they are strictly heavier than Uranium and do not occur naturally. The first transuranic element is Neptunium ($Np$), which has an atomic number of exactly $93$.

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