tiggieimtiggie3132 tiggieimtiggie3132
  • 25-02-2018
  • Chemistry
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Radioactivity in our world _____.
a. is something relatively new
b. is as old as the universe
c. was invented in 1913
d. was caused by atomic bombs

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Dejanras
Dejanras Dejanras
  • 06-03-2018
Radioactivity in our world b. is as old as the universe.
Radioactive atom spontaneously emits energetic particles or waves, while decays on lighter nuclei (atoms with smaller atomic mass). Radioactivity is used to calculate how old is Earth and living things, for that purpose isotope of carbon is used.
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