A table in which the chemical elements are arranged in order of increasing atomic number. Elements with similar properties are arranged in the same column (called a group), and elements with the same number of electron shells are arranged in the same row (called a period).
a highly unstable radioactive element (the heaviest of the halogen series); a decay product of uranium and thorium
Find another word for astatine. In this page you can discover 3 synonyms, antonyms, idiomatic expressions, and related words for astatine, like: periodic-table, at and atomic number 85.