Question

define lanthanoid contraction in your own words.

Answer 1

the decrease in size (as of radii of atoms or ions or of atomic volumes) with increasing atomic number of the metals of the lanthanide series ............

Answer 2

hey mate u r answer __;;;;;__________

The lanthanide contraction is the greater-than-expected decrease in ionic radii of theelements in the lanthanide series from atomic number 57, lanthanum, to 71, lutetium, which results in smaller than otherwise expected ionic radii for the subsequent elements starting with 72, hafnium.[1][2][3] The term was coined by the Norwegian geochemist Victor Goldschmidt in his series "Geochemische Verteilungsgesetze der Elemente"