Justlearning45
Justlearning45 Justlearning45
  • 23-06-2017
  • Biology
contestada

How many neutrons does element X have if its atomic number is 56 and its mass number is 157

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LeChatNoir
LeChatNoir LeChatNoir
  • 23-06-2017
Protons: 56
Electrons: 56
Neutrons: 157-56 = 101
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