Which of the following are true about transition metal elements ?

Question

(a) As the atomic number increases for d-block transition elements, electrons are in general added to an inner d orbital

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

(c) Common oxidation states of nickel include +8

(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

a and e are true. The rest are blatant rubbish!