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How many neutrons are present in bipositive zinc, while A=70
@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 Neutrons70 – 30 = 40 in Zinc atomNo. Neutrons = 40
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