Which of the following defines the mass number of an atom-Number of protons - number of neutrons-Number of protons-Number of electronsNumber of electrons - number of protons-

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Standard VIII

Chemistry

Atomic Mass and Mass Number

Which of the ...

Question

Which of the following defines the mass number of an atom?

Number of protons + number of neutrons

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Number of protons

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Number of electrons

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Number of electrons + number of protons

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