The atomic number of cerium $(Ce)$ is $58$. The correct electronic configuration of $Ce^{3+}$ ion is

The lanthanoid that would show color is

Determine the correct $(T)$ and incorrect $(F)$ statements from the following:
$(a)$ $Lu^{3+}$ and $Yb^{2+}$ are not paramagnetic.
$(b)$ Sheets are made from mischmetal.
$(c)$ Pipes are made from mischmetal.

The number of unpaired electrons in the uranium $({ }_{92} U)$ atom is:

Which of the following statements is $NOT$ incorrect?

In the lanthanide series,the basicity of the lanthanide hydroxides: