Why is magnesium and calcium placed in the same group
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because they have same valency and belonged to same group
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calcium and magnesium are placed in same group because their outermost shell contains same electrons ie 2
calcium- 2,8,2
magnesium- 2,8,8,2
and have same valency 2
calcium- 2,8,2
magnesium- 2,8,8,2
and have same valency 2
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