OnlineCBT
Chemistry · Classification of Elements and Periodicity in Properties
हिन्दीConsider the elements with atomic numbers 58 to 71. These elements belong to which specific series of the periodic table, and what is their general outermost electronic configuration?
Correct answer · Option 1
Lanthanoid series, \( (n-2)f^{1-14}(n-1)d^{0-1}ns^2 \)
Explanation
Elements with atomic numbers 58 to 71 (from cerium to lutetium) form the 4f-inner transition series, known as the lanthanoid series, characterized by the general outer electronic configuration \( (n-2)f^{1-14}(n-1)d^{0-1}ns^2 \).
