Final answer:
None of the listed options (strontium, calcium, sodium, potassium) are transition metals, but rhodium, which is mentioned in the additional information provided, is indeed a transition metal.
Step-by-step explanation:
The transition metals are found in the central block of the periodic table, which includes groups 3 through 12. They are characterized by having d orbitals that can be populated with electrons. Out of the options provided, none are transition metals. However, referencing additional information provided, rhodium (Rh) is a transition metal as it falls within the correct section of the periodic table. Rhodium is a rare, silver-white hard metal and is part of the platinum group. It has the atomic number 45 and is found in group 9 of the periodic table.