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Classification of Elements and Periodicity in Properties
Question
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What are the advantages of classifying the elements into s, p, d and f-block elements?

Answer

These are:
(i) By classifying the elements into s, p, d and f blocks, we can study their physical and chemical properties in a very organised and systematic manner.
(ii) By knowing the block of the element, it is very easy to study the general behaviour and important properties of the elements. For example if the element belongs to s-block, it means it must have 1 or 2 electrons in outermost shell. Hence it must have low value of IE, strongly metallic and electropositive character and form cations easily.
(iii) This classification of elements also explains why properties of d-block elements vary slightly within the same period. This is because inner (n -1) d orbital is being progressively filled up.
(iv) In f-block elements there is progressively filling of (n - 2) f orbitals and this classification also explains why f-block elements are nearly identical in their chemical properties.

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Some More Questions From Classification of Elements and Periodicity in Properties Chapter

How many elements are present in:
(i) second period    
(ii) fourth period    
(iii) sixth period?

What is the name given to the s-block elements?

To which block the element with outer electronic configuration 4s23d10 belongs?

Why are there 10 elements in each series of d-block?

In terms of electronic configuration,
what is common in a given period and group?

Give the general electronic configuration of
(i) Transition elements     (ii) Inner transition elements.

Name the group and period to which an element with Z = 15 belongs ?

What are the advantages of periodic classification of elements?

In the modern periodic table, the period indicates the value of:
(a) atomic number
(b) atomic mass
(c) principal quantum number
(d) azimuthal quantum number.

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.