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).
The ancient Egyptian sun god, the supreme deity represented as a man with the head of a falcon crowned with a solar disk and uraeus.
an intensely radioactive metallic element that occurs in minute amounts in uranium ores
Find another word for radium. In this page you can discover 6 synonyms, antonyms, idiomatic expressions, and related words for radium, like: periodic-table, ra, atomic number 88, polonium, röntgen and radioactivity.