Question
Question: Arrange the following elements in the order of their decreasing metallic character Na, Si, Cl, Mg, A...
Arrange the following elements in the order of their decreasing metallic character Na, Si, Cl, Mg, Al
A
CI > Si >Al > Mg >Na
B
Na >Mg >AI >Si > CI
C
Na > Al > Mg > CI > Si
D
Al > Na> Si > Ca> Mg
Answer
Na >Mg >AI >Si > CI
Explanation
Solution
Metallic character decreases across a period from left to right. All the given elements (Na, Mg, Al, Si, Cl) are in the 3rd period of the periodic table. Na is in Group 1, Mg in Group 2, Al in Group 13, Si in Group 14, and Cl in Group 17. Therefore, their metallic character decreases in the order Na > Mg > Al > Si > Cl.