manuiaxx6119 manuiaxx6119

22-05-2017
Physics

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An atom has an atomic number of 12 and a mass number of 0.25. How many neutrons does the atom have?

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nasir381214 nasir381214

23-05-2017

Number of protons = atomic number (12)
Mass Number = 0.25
mass number = number of protons + number of neutrons
Number of neutrons = mass number - number of protons
Number of neutrons = 0.25 - 12
number of neutrons = - 11.75

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