Q.
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a
The p-block has 6 columns, because a maximum of 6 electrons can occupy all the orbitals in a p-shell
b
The d-block has 8 columns because a maximurn of 8 electrons can occupy all the orbitals in a d-subshell
c
Each block contains a number of columns equal to the number of electrons that can occupy that subshell
d
The block indicates value of azimuthal quantum number (l) for the last subshell that received electrons in building up the electronic configuration
answer is B.
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