what you means by the terms atomic number and mass number
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The number of protons determines an element's atomic number and is used to distinguish one element from another. Together, the number of protons and the number of neutrons determine an element's mass number.
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Atomic number: The total number of protons in the nucleus of an atom gives us the atomic number of that atom.It is represented with the letter ‘Z.’
Mass number: The number of protons and neutrons combined to give us the mass number of an atom.
The number of protons and neutrons combined to give us the mass number of an atom.It is represented using the letter ‘A.’
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