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 modernised periodic table was designed to mark the 150th anniversary of its creation in 1869. It is estimated that about 10 million smartphones are discarded or replaced every month in the EU ...

The periodic table is arranged into columns and blocks that are supposed to mirror how elements’ outermost electrons are arrayed. Elements are grouped into sections called s, p, d and f blocks ...