The electronic configuration of Ca isA. `[Kr]4s^(2)`B. `[Ar]4s^(2)`C. `[Ne]4s^(2)`D. `[He]4s^(2)`

The electronic configuration of Ca isA. `[Kr]4s^(2)`B. `[Ar]4s^(2)`C.

1.	The electronic configuration of Ca isA. `[Kr]4s^(2)`B. `[Ar]4s^(2)`C. `[Ne]4s^(2)`D. `[He]4s^(2)`
Answer» Correct Answer - B Atomic number of Ca is 20. thus, its electronic configuraiton is `1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(2)` or `[Ar]4s^(2)` The atoms of al alkaline earth metals have two s electrons in their outtermost shell `(ns^(2))`. As these elements have similar valency shell electronic configuration, they show regular gradation in their physical properties and exhibit similar chemical properties.

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The electronic configuration of Ca isA. `[Kr]4s^(2)`B. `[Ar]4s^(2)`C. `[Ne]4s^(2)`D. `[He]4s^(2)`

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