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Moving from left to right across a row of the periodic table, which of the following values increases by exactly one from element to element. A.isotope number B.atomic number. C.atomic mass unit. D.mass
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Moving from left to right across a row of the periodic table, which of the following values increases by exactly one from element to element. A.isotope number B.atomic number. C.atomic mass unit. D.mass number

User Saman Khademi
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B the atomic number increases by one.
User CognizantApe
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