In s-block elements, the last electron enters the outermost:
As-orbital
Bp-orbital
Cd-orbital
Df-orbital
Answer & Solution
Correct answer: A. s-orbital
1. Blocks are named for the orbital being filled.
2. For these elements that orbital is spherical.
3. The last electron enters the outermost s-orbital.
_Source: NCERT Class 11 Chemistry Part II, Unit 10, The s-Block Elements._
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