The outcome of a paper chromatography experiment is shown below. X is an aqueous solution of a salt of a Group I element. Y is an aqueous solution of a salt of a transition element. Which row is correct?
- Alarger $R_f$ value: X; requires a locating agent: X
- Blarger $R_f$ value: X; requires a locating agent: Y
- Clarger $R_f$ value: Y; requires a locating agent: X
- Dlarger $R_f$ value: Y; requires a locating agent: Y