ACTINIUM

1- ACTINIUM.

2- trade name:-

ACTINIUM.

3- Chemical symbol:-

Ac.

4- Atomic number:

89; atomic weight: 227.028.

5-Electronic config:-

[Rn]6d17s2; oxidation state: +3.

6- Physical Properties:-

Silvery metal; cubic crystal; melts at 1,051°C; vaporizes at 3,198°C; density 10.0 g/cm3.

7- Chemical Properties:-

It is strongly electropositive, the first ionization potential being 5.17eV. Reacts with HCl forming AcCl3; also reacts with organic acids forming corresponding salts; combustion in air can produce oxide and nitride; susceptible to react with CO2 forming carbonate.

8- Toxicity:-

Exposure to radiation can cause cancer.

9- Occurrence, Preparation and Uses:-

Actinium-227 occurs in uranium ore and is a decay product of uranium-235. It is found in equilibrium with its decay products. It is prepared by bombarding radium atoms with neutrons. Chemically, the metal is produced by reducing actinium fluoride with lithium vapor at 1,100°C to 1,300°C.

Tags : inorganic materials

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