The handy visual reference guide organizes known chemical elements in rows and columns, arranged by their atomic number ... took off on a solo voyage with no concrete idea of how he would land.) ...

organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic number. Scientists use the periodic table to quickly refer to information ...

SINCE Moseley's discovery of the fundamental laws of the X-ray emission, it has become quite clear that the most simple and conclusive characteristic of a Chemical element is given by its X-ray ...