GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It is the total number of protons and neutrons in the nucleus of an atom.
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Isotopes
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Atomic mass
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Atomic number
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None of the above
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Explanation:
Detailed explanation-1: -The total number of protons and neutrons in the nucleus of an atom is called its mass number.
Detailed explanation-2: -Because protons and neutrons are roughly equal in mass, an isotope’s number is equal to the sum of its protons and neutrons. Therefore, oxygen 16 has 8 protons and 8 neutrons, oxygen 17 has 8 protons and 9 neutrons, and oxygen 18 has 8 protons and 10 neutrons.
Detailed explanation-3: -The number of protons in the nucleus of an atom is called it’s Atomic number.
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