SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Magnesium has 12 protons. How many electrons are in the third energy level?
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2
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4
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6
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8
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Explanation:
Detailed explanation-1: -Magnesium has 12 protons, which means that it has a total of 12 electrons. Magnesium will have a total of two electrons in its third shell or third energy level.
Detailed explanation-2: -The third shell holds 18 electrons; 2 in a 3s orbital; 6 in three 3p orbitals; and 10 in five 3d orbitals.
Detailed explanation-3: -The most common and stable type of magnesium atom found in nature has 12 protons, 12 neutrons, and 12 electrons (which have a negative charge).
Detailed explanation-4: -For example, energy level I can hold a maximum of two electrons, and energy level II can hold a maximum of eight electrons.
Detailed explanation-5: -And the Mg2+ ion (ie losses 2 electrons) has 10 electrons.
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