Which of the following statements about transition metals is correct?
a) going from left to right across a row of the transition series, the ionization energy of the neutral atoms decrease.
b) going from left to right across a row of the transition series, the size of metal ions in the 2+oxidation state increases
c) the electronic configuration of the Cr+3 ion is 4s03d3
d) the electronic configuration of a neutral Rh atom is 5s24d6
