The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic ...

Four have filled gaps in the periodic table of 92 elements and five have extended it beyond uranium By I. Perlman & G. T. Seaborg Join Our Community of Science Lovers!

Elements in group 1 and group 2 are metals ... See the study guide on groups in the periodic table for more information.

and all the elements in group 0 are unreactive non-metals. The zigzag, staircase, line in the diagram of the periodic table above separates the metals, on the left, from non-metals, on the right.

Today, 13.8 billion years after the Big Bang, stars have converted about 2 per cent of the universe’s hydrogen and helium into other elements ... guide to the periodic table “There ...