Question

elements where the penultimate shelf is being filled with electrons​

Answer 1

Answer:

the d-block elements, the d orbitals of the penultimate shell are being filled as you move across the block from left to right. For instance, in the 4th row, K has one electron in the 4s orbital and its 3d orbitals are empty.

Answer 2

Explanation:

In the d-block elements, the d orbitals of the penultimate shell are being filled as you move across the block from left to right. For instance, in the 4th row, K has one electron in the 4s orbital and its 3d orbitals are empty.

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