Whys is chemistry of all lanthaoids identical ?

Assign reasons for the following: Why is the chemistry of all lanthanoids indential ?

Explain the following terms : (a) Chemistry of all Lanthanoids is so identical . (b) Silver atom has completely filled d- orbitals (4d^(10)) in its ground state . How can you say that is a transition elements ?

Chemistry of all lanthanoids is so identical. Explain.

Give reason. Why in chemistry of all the lanthanoids is quite similar?

In chemistry of all lanthanoids is quite similar. Why?

Chemistry of all the lanthanoids is quite similar.

(a) Why is chemistry known as an experimental science ? (b) Why are most of the apparatus made of glass?