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Periodic table (f-block): The actinide series comprises elements with which atomic-number range? Identify the standard range used in chemistry for actinides. Choose the correct range.

Q: Periodic table (f-block): The actinide series comprises elements with which atomic-number range? Identify the standard range used in chemistry for actinides. Choose the correct range.

Given data Series: Actinides (5f-block). Concept/Approach Actinides start at actinium (Z = 89) and run through lawrencium (Z = 103), covering the 5f orbital filling sequence. Final Answer 89 to 103

Difficulty: Easy

97 to 104
101 to 115
89 to 103
36 to 43

Correct Answer: 89 to 103

Explanation:

Given data

Series: Actinides (5f-block).

Concept/Approach
Actinides start at actinium (Z = 89) and run through lawrencium (Z = 103), covering the 5f orbital filling sequence.

Final Answer
89 to 103

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