What is periodicity in properties of …

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What is periodicity in properties of elements with reference to the Modern Periodic Table? Why do all the elements of the same group have similar properties? How does the tendency of elements to gain electrons change as we move from left to right in a period? State the reason of this change?

Posted by Ritu Soni 5 years, 3 months ago

CBSE > Class 10 > Science

1 answers

Meghna Thapar 5 years, 1 month ago

(a) Reccurence of similar properties of elements after certain fixed interval of atomic number is called periodicity in properties of elements.
(b) They have similar properties because:
(i) They all have same number of valence electrons.
(ii) They all have same valency.

(c) The tendency to gain electrons increases due to increase in the nuclear charge. Due to this, atomic size decreases and a large number of valence electrons are held towards the nucleus and tendency to gain electrons increases.

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