SSC
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An atom has 10 protons and a mass of 18. It has ____ neutrons
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10
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18
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28
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8
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Explanation:
Detailed explanation-1: -Expert Answer The Oxygen (O) has an atomic number of 8 and has a mass number of 16. Upon accepting 2 electrons it becomes O2-. The mass number is defined as the sum of the number of protons and neutrons present in the molecule. So here for O2-it contains 8 protons, 8 neutrons and 10 electrons.
Detailed explanation-2: -A nitride ion has 7 protons, 8 neutrons, and 10 electrons.
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