alleryWhich block of the periodic table includes the transition elements?
As block
Bp block
Cd block
Df block
Answer & Solution
Correct answer: C. d block
1. The blocks of the periodic table are named after the highest-energy subshell.
2. Transition elements have their valence electrons filling the d subshell.
3. So transition elements are placed in the d block.
4. The d block runs through groups 3 to 12.
_Source: Selina Concise Chemistry ICSE Class 10, Ch 1 'Periodic Table' (aplustopper.com extract)_
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