Explain what the atomic number and atomic mass of an element represent. use an example of an element. describe how the atomic number and atomic mass of an element are calculated.

The atomic number is how many protons are in the nucleus of the atom.  The atomic mass is how much mass is in the atom.  Example: The atomic number of Helium is 2, and the atomic mass is 4.  To calculate the atomic number, simply count the protons.  To calculate the atomic mass of an atom, add up the mass of protons and neutrons.  Hope this helped!  c:

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