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 ...

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.

Browse a list of curated ... structure of the atom, the periodic table, energy levels, and bonding to students. The Explore Science: Let's Do Chemistry kit is designed to stimulate interest, sense of ...