The nucleus of an atom contains 56 neutrons.  The atom contains 43 electrons.  What element is it and what is the mass number of the isotope?

Chemistry: Matter and Change
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ISBN:9780078746376
Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Chapter4: The Structure Of The Atom
Section: Chapter Questions
Problem 68A: Mercury An isotope of mercury has 80 protons and 120 neutrons. What is the mass number of this...
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The nucleus of an atom contains 56 neutrons.  The atom contains 43 electrons.  What element is it and what is the mass number of the isotope?

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