You would look in a science lab for a sample of fermium.

What fermium is

Fermium (atomic number 100) is a synthetic element, meaning it is man‑made rather than naturally occurring in the Earth’s crust or atmosphere in detectable amounts. Because all of its known isotopes have relatively short half-lives, any primordial fermium that may have existed when Earth formed has long since decayed.

Where fermium is found

  • Fermium is produced in specialized facilities via nuclear reactions, such as high‑flux nuclear reactors or nuclear weapon tests, not mined from natural deposits.
  • As a result, any actual samples exist only in highly controlled research environments, i.e., advanced nuclear or radiochemistry laboratories.

Why not in nature

  • Multiple neutron captures would be required to build fermium from naturally occurring actinides like uranium or thorium, a process that is extremely unlikely in normal geological settings.
  • Trace amounts produced in events like nuclear tests are short‑lived and remain in radioactive debris, not as accessible chunks one could simply “find” in the wild.

So if the question is “if you wanted to find a sample of fermium, which has an atomic number of 100, where would you look?”, the correct answer is: in a science lab.

TL;DR: Fermium is synthetic and short‑lived, so the only realistic place to find it is in a specialized science or nuclear research lab, not in natural environments.

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