fifth column, a few of the more marked physical and chemical properties of each metabolon.
| Products | λ(sec) -1 | T | Nature of the rays | Chemical and Physical properties of the product |
|---|---|---|---|---|
| Uranium | — | — | α | Soluble in excess of ammonium carbonate, soluble in ether. |
| Uranium X | 3·6 × 10 -7 | 22 days | β and γ | Insoluble in excess of ammonium carbonate, soluble in ether and water. |
| Thorium | — | — | α | Insoluble in ammonia. |
| Thorium X | 2·0 × 10 -6 | 4 days | α | Soluble in ammonia and water. |
| Emanation | 1·3 × 10 -2 | 53 secs. | α | Chemically inert gas of heavy molecular weight. Condenses at -120° C. |
| Thorium A | 1·74 × 10 -5 | 11 hours | no rays | Deposited on bodies; concentrated on the cathode in an electric field. Soluble in some acids; Th A more volatile than Th B; shows definite electro-chemical behaviour. |
| Thorium B | 2·2 × 10 -4 | 55 mins. | α, β, γ | Same |
| ? | — | — | — | |
| Actinium | — | — | no rays | Insoluble in ammonia. |
| Actinium X | 7·8 × 10 -7 | 10·2 days | α (and β?) | Soluble in ammonia. |
| Emanation | ·17 | 3·9 secs. | α | Behaves like a gas. |