GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The mass number of an atom is equal to
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the number of protons
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the number of neutrons
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the number of nucleons
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the number of protons and electrons
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Explanation:
Detailed explanation-1: -The mass of an atom is the sum of number of protons and number of neutrons present in that atom in atomic mass unit . The total number of protons and neutrons present in a nucleus is termed as nucleon. Therefore, the mass of an atom is equal to the number of nucleons in atomic mass unit .
Detailed explanation-2: -Together, the number of protons and the number of neutrons determine an element’s mass number: mass number = protons + neutrons.
Detailed explanation-3: -Hence nucleons = number of [protons+neutrons]
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