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Question

The diagonal relationship is shown by certain elements of which periods? 



A

2nd and 3rd

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B

3rd and 4th

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C

4th and 5th

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D

1st and 2nd

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Solution

The correct option is B

2nd and 3rd


                 Group1       Group2      Group3      Group4

IIPeriod            Li                      Be                B                   C

                                                                        

IIIPeriod           Na                        Mg               Al                          Si

Certain elements of II period show similarity with their diagonal elements in III period.

They show diagonal relationship, Li resembles Mg, Be resembles Al as these pairs of elements have almost identical ionic radius and polarising power. (i.e. charge/size ratio).


Chemistry

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