Without importance
Astatine has 85 protons.
The valence of astatine is -1.
The odor of astatine is not known up today.
Astatine is not a mineral but a chemical element. Astatine can be obtained as a pure element but in extremely small quantities.
The estimated boiling point is 338 0C; the color may be black. It is impossible for chemists to make a deep study of astatine because they have only very small quantities of this element; also astatine is radioactive, unstable, with a half-life of only 8,1 hours.
As a radioactive element with a short half life astatine is dangerous.
The atomic mass of astatine is 209.9871 atomic mass units (amu). The atomic mass is given for the longest lived isotope of astatine, which is astatine-210, with a half life of 8.3 hours.
All the isotopes of astatine are radioactive and unstable; the most stable isotope is 210At with a half life of 8,1 hours.
213At (Astatine) which has a half life of 125 nanoseconds or 0.000000125 seconds.
Astatine is an element with the symbol At.
Astatine has many isotopes, each with its own half life. The longest in my list is At209 at 8.1 hours, and At215 is listed at 0.1 ms. The shortest are just listed as 'short' reflecting the small quantities.
The color of the element astatine is unknown.
Astatine has 125 neutrons
Astatine has 85 protons.
francium plus (+) Astatine *
The chemical symbol of astatine is At
The chemical symbol of astatine is At