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 ...

The zigzag, staircase, line in the diagram of the periodic table above separates the metals, on the left, from non-metals, on the right. Hydrogen is a non-metal, but it is often put in the middle.

Is the periodic table hanging in your lab ... The guides aim to achieve this by providing transparency through the use of Venn diagrams in addition to improving understanding by discussion and up to ...