What are lengthanoid and actinoid contraction?

1.	What are lengthanoid and actinoid contraction?
Answer» Lenghtanoid CONTRACTION : regular DECREASE in size of atoms and ions with INCREASING atomic number . Actinoid contraction : the gradul decrease in ionic RADII with the increase in atomic number.

Answer»

Lenghtanoid CONTRACTION : regular DECREASE in size of atoms and ions with INCREASING atomic number .

Actinoid contraction : the gradul decrease in ionic RADII with the increase in atomic number.

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