Electronic configuration of the elements are given below: (i) [Ar] 4s

1.	Electronic configuration of the elements are given below: (i) [Ar] 4s2 (ii) [Ar] 3d104s2 (iii) [Ar] 3d104s24p65s2 (iv) [Ar] 3d104s24p65s1 Arrange these elements in increasing order of their metallic character. Give reasons for your answer.
Answer» (i) [Ar]4s² is Calcium metal with At. no. = 20. (ii) [Ar] 3d¹⁰4s² is Zinc metal with At. no. = 30. (iii) [Ar] 3d¹⁰4s²4p¹5s⁶ is Strontium metal with At. no. = 38. (iv) [Ar] 3d¹⁰4s²4p⁶5s² is Rubidium metal with At. no. = 37. Alkali metals are most metallic, followed by alkaline earth metals and transition metals. Among alkali metals - Rubidium (37) is most metallic. Among alkaline earth metals (Ca, Sr), Sr (Strontium) is more metallic than Calcium (Ca) as metallic character increases from top to bottom in a group. Zinc, the transition metal is least metallic. Thus, metallic character increases from Zn < Ca < Sr < Rb or (ii) < (i) < (iii) < (iv)

Electronic configuration of the elements are given below: (i) [Ar] 4s2 (ii) [Ar] 3d104s2 (iii) [Ar] 3d104s24p65s2 (iv) [Ar] 3d104s24p65s1 Arrange these elements in increasing order of their metallic character. Give reasons for your answer.

Answer»

(i) [Ar]4s² is Calcium metal with At. no. = 20.

(ii) [Ar] 3d¹⁰4s² is Zinc metal with At. no. = 30.

(iii) [Ar] 3d¹⁰4s²4p¹5s⁶ is Strontium metal with At. no. = 38.

(iv) [Ar] 3d¹⁰4s²4p⁶5s² is Rubidium metal with At. no. = 37.

Alkali metals are most metallic, followed by alkaline earth metals and transition metals.

Among alkali metals - Rubidium (37) is most metallic. Among alkaline earth metals (Ca, Sr), Sr (Strontium) is more metallic than Calcium (Ca) as metallic character increases from top to bottom in a group. Zinc, the transition metal is least metallic. Thus, metallic character increases from

Zn < Ca < Sr < Rb or (ii) < (i) < (iii) < (iv)

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