We have that he the relative atomic mass of an atom that contains 12 protons, 14 neutrons and 12 electrons is
Mass=26
From the question we are told
What is the relative atomic mass of an atom that contains 12 protons, 14 neutrons and 12 electrons?
Generally the equation for the relative atomic mass is mathematically given as
Mass=protons+neutrons
Mass=12+14
Mass=26
Therefore
The the relative atomic mass of an atom that contains 12 protons, 14 neutrons and 12 electrons is
Mass=26
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