Trend in ionic radii of the lanthanoids (Ln³⁺)लैंथेनॉयडों (Ln³⁺) की आयनिक त्रिज्या में प्रवृत्तिTrend in ionic radii of the lanthanoids (Ln³⁺)

NCERT 4.6 · Class 12 Chemistry · Chapter 4 · interactive diagram

Parts and what they mean

• Lanthanoid contraction (लैंथेनॉयड आकुंचन) — Ln³⁺ radius falls regularly with atomic number: 4f electrons shield one another poorly, so effective nuclear charge rises.
• La³⁺: 106 pm (La³⁺: 106 pm) — Largest Ln³⁺ ion (4f⁰).
• Yb³⁺: 86 pm (Yb³⁺: 86 pm) — Smallest value listed in NCERT Table 4.9 (Lu radii are shown as dashes).
• Axes (अक्ष) — x: La to Yb; y: Ln³⁺ radius in pm, from NCERT Table 4.9.

Original diagram drawn by Simple Learning Hub, based on NCERT 4.6. Report a mistake