sqye9013 sqye9013
  • 11-09-2018
  • Chemistry
contestada

An isotope of radon has 86 protons and 137 neutrons. What is the mass number of this isotope?

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Lhoang2 Lhoang2
  • 22-09-2018
86 + 137 = 223
protons + neutrons = mass
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