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MMLU-Pro / 4441 / In 1976 it was mistakenly believed that the first of the 'superheavy' elements…

Problem

Answer published by the source. Consult the official source to check your work against its answer.

question

In 1976 it was mistakenly believed that the first of the 'superheavy' elements had been discovered in a sample of mica. Its atomic number  was believed to be 126. What is the most probable distance of the innermost electrons from the nucleus of an atom of this element? (In such elements, relativistic effects are very important, but ignore them here.)

category

chemistry

options

  1. 0.12 $\mathrm{pm}$
  2. 0.72 $\mathrm{pm}$
  3. 0.82 $\mathrm{pm}$
  4. 0.22 $\mathrm{pm}$
  5. 0.02 $\mathrm{pm}$
  6. 0.62 $\mathrm{pm}$
  7. 0.42 $\mathrm{pm}$
  8. 0.32 $\mathrm{pm}$
  9. 0.52 $\mathrm{pm}$
  10. 0.92 $\mathrm{pm}$

src

scibench-matter

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Source and history

upstream_id / Original problem ID
4441
task_id
6e2d630d-8d4a-5c7d-bc34-324bdbc81d1d
task_key
default--test--4441
task_revision_id
1
config / split
default / test

Official source

initial import