Question

Question 3.34 Which of the following statements related to the modern periodic table is incorrect?

(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 maximum 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.

Class XI Classification of Elements and Periodicity in Properties Page 94

Answer 1

the p - block has 6 columns, because a maximum of 6 electrons can occupy all the orbitals in a p - shell. it's correct statement.

The d - block has 10 columns , because maximum of 10 electrons can occupy all the orbitals in a d- shell. hence, it's incorrect statement.

each block contains a number of columns equal to the number of electrons that can occupy that subshell. it's correct statement.

The block indicates value of azimuthal quantum number (l) for the last subshell that received electrons in building up the electronic configuration.its correct statement.

hence, option ( b) is answer.