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calcium-45

calcium-45 noun: a radioactive isotope of calcium, 4520Ca, with 20 protons and 25 neutrons, and a half-life of 162.6 days; it is used as a tracer in studying calcium metabolism. As it decays it undergoes nuclear transmutation via electron emission, also called negative beta decay (β⁻-decay), into scandium.

Noun

calcium-45 (uncountable)

  1. A radioactive isotope of calcium, 4520Ca, with 20 protons and 25 neutrons, and a half-life of 162.6 days; it is used as a tracer in studying calcium metabolism. As it decays it undergoes nuclear transmutation via electron emission, also called negative beta decay (β⁻-decay), into scandium.

Questions about calcium-45

What does calcium-45 mean?
Calcium-45 means a radioactive isotope of calcium, 4520Ca, with 20 protons and 25 neutrons, and a half-life of 162.6 days; it is used as a tracer in studying calcium metabolism. As it decays it undergoes nuclear transmutation via electron emission, also called negative beta decay (β⁻-decay), into scandium.
What part of speech is calcium-45?
Calcium-45 is a noun.

Words near calcium-45 in the dictionary

  1. calcium tungstate
  2. calcium-40
  3. calcium-42
  4. calcium-43
  5. calcium-44
  6. calcium-45
  7. calcium-46
  8. calcium-48
  9. calcium-montmorillonite
  10. calcium-montmorillonites
  11. calciumlike

Source and license

Adapted from Wiktionary: calcium-45 (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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