explain the consiquences of lanthanide contraction plz send me a link of video too i need it please help - Chemistry - The d-and f-Block Elements

Question

explain the consiquences of lanthanide contraction plz send me a
link of video too i need it please help

Sumeet Malik · Accepted Answer

The consequences of lanthanide
contraction are:

With increase in atomic number of
lanthanides there is a decrease in the basic character of
lanthanide hydroxides So, we see that
La(OH)3 is the most basic while
Lu(OH)3 is the least basic Because of the contraction
there is a decrease in size of M3+ cation and this decreases the ionic character
between the cation and OH- ion Thus, there is a reduced basic
character

The elements that come after
lanthanides are affected by lanthanide contraction The atomic radii
of period 6 elements is similar to that of elements of period 5
Thus, radii of period 6 elements are smaller than
wouldâ€™ve been expected in the absence of
lanthanides

Because of smaller size of period
6 elements, and the fact that they are very tightly packed in their
metallic crystal that they have very high densities The densities
of elements in third transition series is almost double that of
elements in the second transition series

The ionic size of
Y3+ and Fr3+ is similar with similar charges There is a
large similarity in the crystal structure, chemical properties and
solubility between Yttrium compounds and compounds of other heavier
lanthanides Thus, Yttrium is regarded as a
lanthanide

You can refer to the given link for video:

http://cbse meritnation
com/study-online/study-material/saTUraHv$y6GSj4WRzsU1Q!!/BRNrbwiCb3KX0fqDlEYSZQ!!