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OpenStudy (anonymous):
An atom has a mass number of 53 and an atomic number of 26. How many neutrons does it have? Include a formula that explains your calculation.
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OpenStudy (anonymous):
Atomic number = Z (number of protons) Mass number = N (number of protons PLUS neutrons So N - Z = Number of neutrons. So... 27 neutrons!
OpenStudy (anonymous):
Sorry, atomic mass is usually given as 'A'
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