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Statement (A): Repeating the properties of elements in a regular intervals known as periodicity.
Statement (B): Having the similar valence electronic configuration is cause of periodicity.
Statement (C): Higher the inner electrons greater shall be the value of screening effect. [ ]. a) All the above statements are correct
b) All the above statements are incorrect
c) A and B are correct but C is incorrect
d) A and B are incorrect but C is correct
Answers
Answer:
(c) A and B are correct but C is incorrect.
Answer:
A.All The Statements A ,B and C are correct
Explanation:
Statement -1: The meaning of the word periodicity is the particular property of elements is repeated at regular intervals such as 2,8,8,18,18 and 32. Therefore statement -1 is correct.
Statement-2: The similar properties are observed with elements belonging to the same group which have been arranged in group after the difference of either 2or 8 or 18 or 32 in atomic number of similar valence shell electronic configuration recur after certain interval of atomic number, thus this will cause periodicity in the properties of elements. Thus the statement -2 is correct.
Statement-3 :The magnitude of the screening effect depends upon the number of inner electrons ,thus the statement-3 is correct.