GK
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A magnesium atom has an atomic number of 12, a mass number of 25, and a +2 charge. This atom would contain ____ protons, ____ neutrons, and ____ electrons.
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12; 25; 2
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12; 13; 14
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12; 13; 10
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None of the above
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Explanation:
Detailed explanation-1: -In, Magnesium having +2 charge which means magnesium loses 2 electrons. Therefore, the number of electrons is 12-2 = 10 . In Option D there are 12 neutrons, 12 protons, and 10 electrons.
Detailed explanation-2: -The atomic number of Magnesium is 12, and its Mass number is 24. So there are 24-12 = 12 neutrons present in its nucleus.
Detailed explanation-3: -The element with the atomic number 12 is magnesium. This is 25Mg, or magnesium-25, which can be abbreviated as Mg-25.
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