Justify the given statement with suitable examples the properties of the elements are a periodic function of their atomic numbers''.

Justify the given statement with suitable examples the properties of t

1.	Justify the given statement with suitable examples the properties of the elements are a periodic function of their atomic numbers''.
Answer» Solution :(i)The cause of periodicity in properties the REPETITION of similar outer electronic CONFIGURATION after certain REGULAR intervals. (ii)Eg : Consider elements of group 1 s `_(3)Li-1s^(2)2s^(1)` `_(11)Na-1s^(2)2s^(2)2p^(6)3s^(1)` Due to similar OUTERMOST electronic configuration they exhibit similar properties.