Question

Choose trivalent cations
(A) Radium, Barium
(B) Ferrous, Aluminium
(C) Ferric, Gallium
(D) Zinc, Ferric​

Answer 1

Answer:

The active ions of choice are the ions of the 3d transition metals such as Cr3+ and Ti3+ and the trivalent ions of 4f rare-earth (RE) elements. The ionic radii of the 3d ions are rather small and they depend strongly on the coordination number of surrounding ligands.

Answer 2

Answer:

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Explanation:

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