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  • Which of the following set of elements is written in order of their increasing metallic character(a) Be Mg Ca (b) Na Li K (c) Mg Al Si (d) C O N

Which of the following set of elements is written in order of their increasing metallic character?
(a) Be             Mg      Ca
(b) Na             Li         K
(c) Mg            Al        Si
(d) C               O         N

Answers (1)

Ans (a)
Sol

When we move from top to bottom in group the metallic nature increases as the atomic size increases due to increase in the number of shells.
Hence metallic character:
Ca > Mg > Be

K >Na > Li
Metallic character goes on decreasing while going from left to right in a period.
Hence metallic character:
Mg > Al > Si

C> N >O

Hence option (a) is correct.

 

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