Give the general electronic configurations of actinoids.

What are transition elements? Which of the following are not transition elements?

$\mathrm{Cu} (\mathrm{Z}=29), \mathrm{S} (\mathrm{Z}=16), \mathrm{Ga} (\mathrm{Z}=31), \mathrm{Pd} (\mathrm{Z}=46) \mathrm{and} \mathrm{U} (\mathrm{Z}=92)$
 

Locate each of the following elements on the periodic table and identify each of them.

$\left[\mathrm{Ar}\right]3{\mathrm{d}}^{7}4{\mathrm{s}}^2$

Locate each of the following elements on the periodic table and identify each of them.

$\left[\mathrm{Ar}\right]3{\mathrm{d}}^{5}4{\mathrm{s}}^1$