Multiple choice general knowledge science & technology

Which element other than transuranic elements was first created in lab and then found in Nature in trace amounts as by-product of natural radioactivity?

  1. Columbium

  2. Actinium

  3. Fermium

  4. Technetium
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Technetium (Tc, atomic number 43) was the first element artificially produced in 1937 before being found in nature. It was later discovered in trace amounts in uranium ores as a product of spontaneous fission. All elements with atomic numbers > 92 (transuranic) are also artificial.

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