SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The ____ contains the protons and neutrons of an atom, and is most of the mass of an atom
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Nucleus
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Atomic Number
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Atomic Mass
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Electrons
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Explanation:
Detailed explanation-1: -The mass of an atom is due to the mass of its nucleus and the nucleus of an atom contains protons and neutrons together called as nucleons .
Detailed explanation-2: -Nucleus is the central part of an atom in which protons and neutrons are held together.
Detailed explanation-3: -The ‘atomic mass’ of the nucleus is given by A=Z+N, where N is the number of neutrons in the nucleus. Different isotopes of an element have different numbers of neutrons in their nucleus.
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