Questions
Which of the following pair of elements are from the same group of the periodic table
a
Mg, Cs
b
Mg, Sr
c
Mg, Cl
d
Na, Cl
detailed solution
Correct option is B
In the periodic table, the elements Ma and Sr belong to same group (IIA) with valency configuration
Ex: Mg (Z= 12); Electronic configuration is
For Sr (Z =38); Electronic configuration is
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