astatine

基本解释

Here is a brief description of astatine.
廻複：砹的顔色是什麽？
Any of a group of five chemically related nonmetallic elements including fluorine,chlorine,bromine,iodine,and astatine.
鹵素包括氟、氯、溴、磺、砹有化學聯系的五個非金屬元素一族中的任何一個
Any of a group of five chemically related nonmetallic elements including fluorine, chlorine, bromine, iodine, and astatine.
鹵素包括氟、氯、溴、磺、砹有化學聯系的五個非金屬元素一族中的任何一個
Any of the five nonmetallic elements with similar chemical properties: fluorine, chlorine, bromine, iodine (I), and astatine (At).
周期表VIIa族元素，包括五種化學性質類似的非金屬元素:氟（F）、氯（Cl）、溴（Br）、碘（I）和（At）。
astatine should have the greatest tendency to form ??ations
砹應該具有形成陽離子?鬃佘蟮那閬頡?/UK>

a chemical element that is radioactive and is the rarest natural element on the Earth's surface

a radioactive element of the halogen series: a decay product of uranium and thorium that occurs naturally in minute amounts and is artificially produced by bombarding bismuth with alpha particles. Symbol: At atomic no: 85 half-life of most stable isotope, 210At: 8.1 hours probable valency: 1,3,5, or 7 melting pt: 302C boiling pt: 337C (est)