The periodic table is a familiar sight today, and its peculiar shape is now understood to reflect the way electrons arrange themselves around the nucleus inside the atom.

Iron is a metal in group VIII of the periodic table with atomic number 26, an atomic weight of 55.85, and a density of 7.86. It has a melting point of 1539 C. The electronic configuration of the Fe ...

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 ...

Learn about elements, compounds and mixtures in this KS3 Chemistry guide from BBC Bitesize.

The modern periodic table arranges elements close element A pure substance which is made from only one type of atom. Elements are listed on the periodic table. into a unique arrangement that can ...