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Q: How many protons, electrons, and neutrons does an atom with atomic number 50 and mass number 125 contain? a 70 neutrons, 75 protons, 50 electrons b 120 neutrons, 50 protons, 75 electrons c 50
protons, 50 electrons, 75 neutrons d 75 electrons, 50 protons, 50 neutrons
A: 50 protons, 50 Electrons and 75 Neutrons. The Atomic number is the number of protons in the nucleus of an atom, while the mass number is the sum of the protons plus the neutrons. [ The electrons have near 0 mass so they don't add up to the mass number and unless the atom is an isotope, the number of protons is always equal to those of electrons. ]
Expert answered|wisbest|Points 1806|
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Asked 2/8/2013 4:16:49 PM
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