On the basis of electronic configuration, all the elements in the long form of the periodic table have been grouped in :
A
3 blocks
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B
4 blocks
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C
4 blocks + lanthanides
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D
2 blocks + lanthanides + actinides
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Solution
The correct option is C 4 blocks On the basis of electronic configuration, all the elements in the long form of the periodic table have been grouped in 4 blocks. These include s,p,d and f block elements.