At
INTRODUCTION
Astatine from the Greek word, astatos 'unstable', is a radioactive element, and also the heaviest of the halogens. No stable isotopes of astatine exist. It was not originally known to occur in nature.
Atoms of astatine have been detected in some naturally occurring ores of uranium and other radioactive elements. Astatine-210 is the longest-lived isotope, with a half-life of about 8.1 hours.
BASIC INFORMATIONS
- Atomic Number
- 85
- Atomic Mass
- 210
- Atomic radius
- N/A
- Ionization energy
- 912
- Electronic config
- 2,8,18,32,18,7
- Principal Valency
- -1
- Density g/cm³
- N/A
- Melting point °C
- 302
- Boiling point °C
- 337
- Type of Element
- Metalloid
- Electronegativity
- 2.2
- Element Category
- Halogen
- Appearance
- N/A
- Block
- d-block
- Period
- 6
- Group
- 17
- No of Isotopes
- 37
- Occurrence
- Radioactive
- Abundance in ppm
- Trace
- Year of Discovery
- 1940
EXTRACTION
It is extracted by physical separation
OXIDATION STATES
-1,+1,+3,+5,+7
MAJOR SOURCE
Radioactive process
EXAMPLES OF COMPOUND PRESENT
N/A
ECONOMIC IMPORTANCE
* It is highly carcinogenic, mammary and pituitary tumors have been induced in laboratory animals by a single injection.
* It is largely used for radioactive / nuclear research, and for experimental purposes.
