A) ionic radius of the series.
B) valence electrons of the series.
C) the density of the series.
D) electronegativity of the series.
Correct Answer: A
Solution :
Due to 4f-orbital electrons (poor shielding effect) there is increase in effective nuclear charge which leads to the contraction of the size of atoms. This is called lanthanide contraction.You need to login to perform this action.
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