please need help with this chem question?

Question

Which of the following are true about transition metal elements ?


(a) As the atomic number increases for d-block transition elements, electrons are added to outer s and p orbitals

(b) Metals in high oxidation states tend to be good oxidizing agents

(c) A common oxidation state of scandium is +2

(d) Going across a period the atomic radii changes a great deal.

(e) As the atomic number increases for the lanthanides and actinides transition metal elements,
electrons are added to an inner d orbital.

Answer 1

Letter b.