1.

Modern peroidic table helps classify elements according to their similarities.Consider the columns mentioning certain details about elements with comments on their important features. Answer the question that follow : The appropriate combination for Lanthanum is :

Answer»

(I)(ii)(S)
(IV)(iii)(S)
(III)(iii)(R)
(IV)(iv)(Q)

Solution :La belongs to `3^(RD)` GROUP has atomic no `gt` group has atomic no `gt 54`
last `e^(-)` enters d,f subshall.


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