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Grade 11Physical Chemistry

How many neutrons are present in bipositive zinc, while A=70

Profile image of Nitin Kumar
9 Years agoGrade 11
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1 Answer

Profile image of Yagnesh Devada
9 Years ago
@nitin A=mass number is sum of the number protons and neutrons in an atom. 
Z= Atomic Number is the number electron/protons present in an atom(netrual atom will have the same number of protons and electrons). Then to find the number of neutrons:
Mass Number – Atomic Number = No. of Neutrons
70 – 30 = 40 in Zinc atom
No. Neutrons = 40