alleryThe two rows shown separately at the bottom of the modern periodic table are called:
AAlkali and alkaline earth series
BHalogen and noble gas series
CLanthanide and actinide series
DTransition and inner series
Answer & Solution
Correct answer: C. Lanthanide and actinide series
1. Apart from the seven main rows, two rows are placed at the bottom.
2. These are named the lanthanide series and the actinide series.
3. Together they form the f-block of the table.
4. Rule out D: 'transition' refers to d-block elements within the main body.
_Source: Balbharati (Maharashtra Board) Class 10 Science & Technology, Ch 2 "Periodic Classification of Elements", p.30_
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