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What is the mass number of an isotope with an atomic number of 57 and that has 69 neutrons?
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What is the mass number of an isotope with an atomic number of 57 and that has 69 neutrons?

User ViKiG
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1 Answer

6 votes

Answer:

mass number=126

Step-by-step explanation:

57+69=126

User MarkoHiel
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