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What is the top number what is the bottom number?

Updated: 8/19/2019
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13y ago

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If you are asking about the numbers shown on elements the larger of the two numbers is the Mass Number ( the number of protons and neutrons added together) and the smaller number is the Atomic or Proton Number (the number of protons)

Top and bottom are also properties of Quarks along with Up & Down and Strange & Charm

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13y ago
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Q: What is the top number what is the bottom number?
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