Considering theelements B ,A1, Mg and K, the correctorderof theirmetalliccharacteris : (a) B gt A1 gt Mg gt K ( b)A1 gt Mg gt B gt K( c)Mg gt A1 gt K gt B( d)K gt Mg gt A1 g B

Considering theelements B ,A1, Mg and K, the correctorderof theirmetal

1.	Considering theelements B ,A1, Mg and K, the correctorderof theirmetalliccharacteris : (a) B gt A1 gt Mg gt K ( b)A1 gt Mg gt B gt K( c)Mg gt A1 gt K gt B( d)K gt Mg gt A1 g B
Answer» Solution :In a periodelectronegativityincreasesand HENCETHE metallic character decreases as wemove from left to right. Thereforemetalliccharacterof K, MG and A1decreasesin the order : `K GT Mg gt A1` . However, within agroupthe electronegativitydecreasesand hencethe metalliccharacterincreases from top to bottom. ThusA1 ismoremetallicthan B. Thereforethe CORRECTSEQUENCE ofdecreasing metalliccharacter is `: K gt Mg gt A1 gt B` i.e., option( d) iscorrect.