Nov '16
27
MCAT Question of the Day | MCAT Course


  • Q:

    Which of the following is true regarding the mass number for an atom?

     

    A

    It is equivalent to the number of protons.

    B

    It is equivalent to the sum of the protons and electrons.

    C

    It differs for different isotopes of the same atom.

    D

    It decreases going leftward along a group on the periodic table.




    Tags: Periodic Table | Suggest a tag
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