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Question
An element belongs to the 3rd period and Group II of the periodic table.
Name of the element is ________.
Name of the element is ________.
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Solution
The correct option is D magnesium
As it is in period 3 valence shell is 3 that is n=3 and since it's present in group 2, it has 2 valence electrons in the third shell. Hence its valence shell configuration is 3s2.
Hence in the first orbital, it will have 2 whereas in second orbital it will have 8 electrons, on the whole, it has 12 electrons that is the atomic number is 12. Hence the name of the element is magnesium.
As it is in period 3 valence shell is 3 that is n=3 and since it's present in group 2, it has 2 valence electrons in the third shell. Hence its valence shell configuration is 3s2.
Hence in the first orbital, it will have 2 whereas in second orbital it will have 8 electrons, on the whole, it has 12 electrons that is the atomic number is 12. Hence the name of the element is magnesium.
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