GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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How many electrons are in a neutral atom of sodium-23?
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22
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11
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12
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23
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Explanation:
Detailed explanation-1: -An atom of sodium has 11 protons, 11 electrons, and 12 neutrons.
Detailed explanation-2: -Number of neutrons = 23-11 = 12. Therefore, Number of protons, number of neutrons and number of electrons in the neutral sodium atom are equal to 11, 12 and 11 respectively.
Detailed explanation-3: -Atomic number is equal to the number of protons hence sodium atoms have 11 protons in the nucleus. Also, the atom has a mass number equal to the number of protons and neutrons, since the mass number of sodium is 23 so, there must be (23-11) = 12 neutrons in the nucleus. Was this answer helpful?
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