How many neutrons and protons are there in the following nuclei ?

1.	How many neutrons and protons are there in the following nuclei ?
Answer» We know atomic number(z) = no of protons = no of electronsAlso mass number(A) = no of protons + no of neutrons136C:Here mass number = 13Atomic number = Number of protons = 6Number of neutrons = (mass number) – (Atomic number)= 13 – 6 = 78O16:Here mass number = 16Atomic number = 8 Number of protons = 8 Number of neutrons = (mass number) – (Atomic number)= 16 – 8 = 812Mg24:Here Mass number = 24Atomic number = Number of protons = 12Number of neutrons = (mass number) – (Atomic number)= 24 – 12 = 1226Fe56:Here mass number = 56Atomic number = Number of protons = 26Number of neutrons = (mass number ) – (Atomic number)= 56 – 26 = 3038Sr88:Here mass number = 88Atomic number = Number of protons = 38Number of neutrons = (mass number) – (Atomic number)= 88 – 38 = 50

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