Carbon-12 and carbon-13 are isotopes of carbon. Which of the following statements is correct? They both have seven protons in the nucleus. They both have the same mass number. They both have seven neutrons in the nucleus. They both have the same atomic number.

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Explanation:

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the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.