Karpetwolfearly Karpetwolfearly

22-04-2016
Chemistry

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What is mass number?

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ellybubble ellybubble

24-04-2016

Mass number on the periodic table is the bigger number. For example, Hydrogen's atomic number is 1, and mass number is 1.008. The mass number (rounded) is the total number of neutrons and protons in an atom.

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