astatine
/ˈastətiːn
/noun [mass noun]
The chemical element of atomic number 85, a radioactive member of the halogen group. Astatine was first produced by bombarding bismuth with alpha particles, and it occurs in traces in nature as a decay product. (Symbol: At) The halogens are a group of chemical elements that includes fluorine, chlorine, bromine, iodine, and astatine....
- There is evidence that astatine behaves like iodine in the body.
- By one estimate, no more than a millionth of a gram of astatine has ever been produced in the lab.
Origin
1940s: from Greek astatos 'unstable' + -ine4.
- you are welcome
- you bet
- you betcha
- you (can) bet your boots
- you (can) bet your bottom dollar
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- you can lead (or take) a horse to water but you can't make him drink
- you can say that again!
- you can't get a quart into a pint pot
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- you can't judge a book by its cover
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- you can't lose
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- you can't (or can) talk (you shouldn't or should talk)
- you can't put an old head on young shoulders
- you can't teach an old dog new tricks
- you can't win them all (or win some, lose some)
- you could have fooled me!
- you could have knocked me (or her, him, etc.) down with a feather
- you couldn't make it up
- you'd
- you don't say (or you don't say so)!
- Youghiogheny River