nikitanicole95 nikitanicole95
  • 23-06-2021
  • Chemistry
contestada

an atom has 31 electrons 39 neutrons and 31 protons. it follows that its mass number is​

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CapnJackSparrow CapnJackSparrow
  • 23-06-2021

Answer:

mass no = 70 amu

mass no = neutrons+ protons

pls mark me as the brainliest

Explanation:

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