Question

Which elements are not arranged according to their electronic configuration

Answer 1

Answer:

the electronic configuration of these elements is (n-1) d 1–10ns 1–2. The (n–1) remains for the inward d orbitals which may have one to ten electrons and the peripheral ns orbital may have one or two electrons. The d block includes the middle area marked by s and p blocks in the periodic table.

Answer 2

Answer:

Mendeleev arranged the elements according to both atomic weight and valence. Not only did he leave space for elements not yet discovered, but he predicted the properties of five of these elements and their compounds

Explanation:

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