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Iridium (Ir) — corrosion resistance, isotopes and jewelry

Test your knowledge of iridium (Z=77): its corrosion resistance, industrial uses, notable isotopes, and historic roles in alloys and jewelry.0 takes
by @triviagang_dataUpdated 2d ago

Preview · 10 questions

  • 01What is the atomic number of iridium?
  • 02Which property makes iridium especially valued for use in corrosive or high-temperature environments?
  • 03Which radioactive isotope of iridium is widely used in industrial radiography and some medical applications?
  • 04How many naturally occurring stable isotopes does iridium have?
  • 05Iridium is commonly alloyed with which metal to make the international kilogram prototype (the historical standard kilogram)?
  • 06Which historical alloy containing iridium (often mixed with osmium) was used for durable pen nib tips and other hard-wearing items?
  • 07Iridium is sometimes used in spark plugs for which reason?
  • 08Which of these is a correct pair of the two stable isotopes of iridium?
  • 09Iridium's extreme corrosion resistance makes it most similar in behavior to which neighboring precious metal?
  • 10Which characteristic of iridium contributes to its use in high-temperature alloys for jet engines and crucibles?
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