The Periodic Table/85 - Astatine (At)

Element Astatine (At, 85)

Here you can read more about the chemical element Astatine. Its shemical symbol is At and its atomic number is 85. The relative atomic mass of Astatine is 210 u. The elemental classification of Astatine is Metalloids, and it belongs to group 17 and period 6 in the Periodic Table of Elements.

The melting point of Astatine is 575 Kelvin (302 ℃). The boiling point of Astatine is 610 Kelvin (337 ℃). Astatine was discovered in the year 1940 by Dale R. Corson, Kenneth Ross MacKenzie and Emilio Segr√®.

To the right (or below if you are using a mobile device with a smaller screen) you will find the information given above for the element Astatine ordered in tabular form, which might be easier to read and use if you want to quantify it in some sort.


Data about element Astatine

Chemical symbol
At
Element classification
Metalloids
Atomic number
85
Group
17
Period
6
Relativ atomic mass
Atomic mass
210 u
Melting point
575 K   (302 ℃)
Boiling point
610 K   (337 ℃)
Discovered year
1940
Discovered by
Dale R. Corson, Kenneth Ross MacKenzie och Emilio Segrè