Question

What is the valence electronic configuration of f - Block elements?

Answer 1

The f-block is that pesky, enigmatic block of elements below the table you usually look at, but kicker—it's supposed to be between the s and d blocks!

So, for instance, looking at `U`

We have,
`U`:`[Rn]7s^2 5f^4`

In an anomalous case, which is quite nuanced (which you may not need to know), `U` actually has a different electron configuration than expected:

`U`:`[Rn]6s^1 7s^2 5f^3`