2. Astatine is a radioactive chemical element with the chemical symbol At and atomic number 85. It occurs on Earth as the result of the radioactive decay of certain heavier elements

3.  Symbol: At  Electron configuration: Xe 4f14 5d10 6s2 6p5  Atomic number: 85  Melting point: 575.3°F (301.8°C)  Discovered: 1940  Atomic mass: 210 u  Chemical series: Period 6 element, Metalloid, Halogen

4. ASTATINE IS RADIO ACTIVE. CANT BE SEEN WITH HUMAN EYE BECAUSE ITS RADIO ACTIVE.

5. This is a recap of what we have learn of the element astatine.