Question

what is lanthonide construction explain cause of lanthonide​

Answer 1

Lanthanoid contraction, also called lanthanide contraction, in chemistry, the steady decrease in the size of the atoms and ions of the rare earth elements with increasing atomic number from lanthanum (atomic number 57) through lutetium (atomic number 71).

Answer 2

Answer:

The lanthanide Contraction describes the atomic radius trend that the series exhibit. Another necessary feature of the The lanthanide Contraction refers to the actual fact that the 5s and 5p orbitals penetrate the 4f sub-shell therefore the 4f orbital isn't protected from the increasing nuclear modification, that causes the atomic radius of the atom to decrease. This decrease in size continues throughout the series.

The lanthanide Contraction is that the results of a poor shielding result of the 4f electrons. The protecting result is delineated because the development by that the inner-shell electrons shield the outer-shell electrons in order that they aren't accomplished by nuclear charge. thus once the shielding isn't nearly as good, this may mean that the charged nucleus encompasses a bigger attraction to the electrons, therefore decreasing the atomic radius because the number will increase. The s orbital has the best shielding whereas f has the smallest amount and p and d in between the two with p being bigger than d.