Per NCERT §3.3, the long form of the periodic table contains how many periods, and the 6th + 7th periods would each maximally contain how many elements?
A5 periods; each 8 elements
B6 periods; each 18 elements
C8 periods; each 16 elements
D7 periods; 6th + 7th each maximum 32 elements
Answer & Solution
Correct answer: D. 7 periods; 6th + 7th each maximum 32 elements
Per NCERT §3.3, 7 periods. Sizes: 2, 8, 8, 18, 18, 32, 32 (7th currently incomplete). Lanthanoids + actinoids placed in separate panels.
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