1. All are radioactive and have similar properties to actinium.

2. Discovery of element actinium by French chemist Andr...-Louis Debierne.

3. Any of a series of chemically similar, radioactive elements with atomic numbers ranging from 89 ( actinium ) through 103 ( lawrencium ).

4. The extraction mechanism and separation process of lanthanum and actinium were studied in HDEHP ( kerosene ) NO 3 system.

5. There are three naturally occurring radioactive series - the thorium series, the actinium series, and the uranium series.

6. Actinide: Any of the series of 15 consecutive chemical elements in the periodic table from actinium to lawrencium (atomic numbers 89-103).

7. But was pulls out empties entire heart to love your actinium.

8. The extraction mechanism and separation process of lanthanum and actinium were studied in HDEHP ( kerosene ) - HNO 3 system.