Question

Arrange the following elements in the order of their decreasing metallic character
Na, Si, Cl, Mg, Al
(a) Cl > Si >Al > Mg >Na
(b) Na >Mg >Al >Si > Cl
(c) Na > Al > Mg > Cl > Si
(d) Al > Na> Si > Ca> Mg

NCERT Class X
Science - Exemplar Problems

Chapter_Periodic Classification of Elements

Answer 1

(B)  is the correct answer  = Na > Mg > Al > Si > Cl...

Answer 2

Answer: Option (b) is the correct answer.

Explanation:

It is known that when we move downwards in a group then there is increase in metallic character and when we move across a period from left to right then there will be decrease in metallic character.

Therefore, the given elements Na, Si, Cl, Mg, Al all belongs to third period. Hence, they are arranged in the order of their decreasing metallic character as follows.

                               Na > Mg > Al > Si > Cl