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Q. F block elements in the periodic table which are commonly called Lanthanides have the following atomic numbers:
Answer: 57-71
Notes: The correct answer is 2. The lanthanides are a series of 15 elements in the periodic table, from atomic numbers 57 (Lanthanum) to 71 (Lutetium). They are known for their similar properties and are often found together in nature. The range of atomic numbers for lanthanides is 57 to 71, not 57-70 or 58-70.

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