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a) It can be greater than atomic number.
REASON : The mass number of an atom is the total number of protons and neutrons it contains. The mass number of an atom is never smaller than the atomic number. It can be the same, but is usually bigger.
REASON : The mass number of an atom is the total number of protons and neutrons it contains. The mass number of an atom is never smaller than the atomic number. It can be the same, but is usually bigger.
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a) option is the correct answer
a) it can be greater than the atomic number
a) it can be greater than the atomic number
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