KnowraLanthanide contractionLinked fromLinked fromThe 25 pages that link to Lanthanide contraction, each with the reason it gives.All 25Broader topic 3Related 22Periodic trendsBroader topic: It produces unusually small later elements and alters expected size comparisons across periods.Atomic radiusBroader topic: It is a major deviation from size trends explained by shell addition alone.Effective nuclear chargeBroader topic: Poor shielding by 4f electrons raises effective nuclear attraction across this series.