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Standard XI
Chemistry
NCERT
Question

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 (I) for the last subshell that received electrons in building up the electronic configuration

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Solution
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The option (b) represents incorrect statement. It states that
"The d-block has 8 columns because a maximum of 8 electrons can occupy all the orbitals in a d-subshell."
The correct statement is
"(b) The d-block has 10 columns because a maximum of 10 electrons can occupy all the orbitals in a d-subshell"

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Similar Questions
Q1
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 (I) for the last subshell that received electrons in building up the electronic configuration
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Q2
Consider the following statements and arrange in the order of true/false as given in the codes.
S1: In the modern periodic table each block contains a number of columns equal to the number of electrons that can occupy that sub-shell.
S2: the greatest increase in ionization enthalpy is experienced on the removal of the electron from the core noble gas configuration.
S3: The size of the isoelectronic species is affected by electron-electron interaction in the outer orbitals.
S4: Anything that influences the valence electrons will affect the chemistry of the element and the valence shell is not affected by nuclear mass.
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Q3
Identify the correct statements among the following:
(A) All orbitals in a shell are degenerate.
(B) Electron configuration of chromium violates Aufbau principle.
(C) Maximum number of unpaired electrons in 'f' subshell is 7.
(D) Maximum number of unpaired electrons in a subshell is 4l + 1.
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Q4

Maximum number of electrons that can be accommodated in the subshell with azimuthal quantum number l = 4, is


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Q5
Maximum number of electrons that can be accommodated in the subshell with the azimuthal quantum number l=4, is:
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