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Periodic table

1

Elements belonging to the same group of the periodic table have generally the same :

2

Select the elements of group 14 of the periodic table (atomic nos. are given)

3

An element having electronic configuration [Ar] 3d2 , 4s2 belongs to :

4

If Aufbau rule is not followed, Ca-20 will be placed in …….. block.

5

The group in which all the elements do not have same number of electrons in their valence shell is