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प्रश्न
An element ‘M’ has 25% of the electrons filled in the third shell as in the second shell. The element ‘M’ is ______.
पर्याय
Sodium
Magnesium
Aluminium
Calcium
MCQ
रिकाम्या जागा भरा
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उत्तर
An element ‘M’ has 25% of the electrons filled in the third shell as in the second shell. The element ‘M’ is magnesium.
Explanation:
Magnesium’s second shell contains eight electrons, whereas its third shell contains two electrons in 25% of cases. The electrical configuration of magnesium is 2, 8, 2.
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