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Q. Elements are classified into four blocks as $s$-block, $p$-block, $d$-block and $f$-block on the basis of

Classification of Elements and Periodicity in Properties

Solution:

Elements are classified into four blocks, as $s$-block, $p$-block, $d$-block and $f$-block on the basis of atomic orbitals (viz. $s, p, d$ and $f$ ).