GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The atomic number of Magnesium (Mg) is 12; how many electrons will it have in 1st and 3rd shells?
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2, 3
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4, 2
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2, 2
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2, 8
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Explanation:
Detailed explanation-1: -That means there are 12 electrons in a magnesium atom. Looking at the picture, you can see there are two electrons in shell one, eight in shell two, and two more in shell three. ► More about the history and places to find magnesium.
Detailed explanation-2: -And the Mg2+ ion (ie losses 2 electrons) has 10 electrons.
Detailed explanation-3: -In order to write the Mg electron configuration we first need to know the number of electrons for the Mg atom (there are 12 electrons).
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