Table of Contents
What is the density of astatine?
Data Zone
| Classification: | Astatine is a halogen and a nonmetal |
|---|---|
| Neutrons in most abundant isotope: | 125 |
| Electron shells: | 2,8,18,32,18,7 |
| Electron configuration: | [Xe] 4f14 5d10 6s2 6p5 |
| Density @ 20oC: | 7 g/cm3 approx. |
Is astatine solid liquid or gas?
At this temperature, fluorine and chlorine are gases, bromine is a liquid, and iodine and astatine are solids. There is therefore a trend in state from gas to liquid to solid as you go down the group.
How much is a gram of astatine?
Average Reported Cost: $0.
What is astatine formula?
Astatine | At2 – PubChem.
What are the bulk properties of the element astatine?
The bulk properties of astatine are not known with any certainty. Many of them have been estimated based on the element’s position on the periodic table as a heavier analog of iodine, and a member of the halogens (the group of elements including fluorine, chlorine, bromine, and iodine).
Is the boiling point of astatine higher than iodine?
Astatine undergoes sublimation but less readily than iodine and have a low vapor pressure. Its boiling point and melting point also follow the trend of this group and are higher than other members of the halogen family.
When was the discovery of the element astatine?
It was discovered in 1940. The existence of astatine was predicted in the halogen family under iodine by Dmitir Mendellev (1869) and by Neild Bohr. However, due to its unstable nature, it was discovered after a long tikme. Astatine was isolated as an element by Dale R. Corson, Ross MacKenzie and Emilio Serge in 1940.
How is the electron affinity of astatine determined?
Electron affinity of Astatine is 270.1 kJ/mol. In chemistry and atomic physics, the electron affinity of an atom or molecule is defined as: the change in energy (in kJ/mole) of a neutral atom or molecule (in the gaseous phase) when an electron is added to the atom to form a negative ion.