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 ...

Every element is made up of its own type of atom. This is why the chemical elements are all very different from each other. Everything in the universe contains the atoms of at least one or more ...

Atoms are the building blocks of everything. Atoms can form strong bonds with each other, making molecules. Symbols and formulae Letters from the alphabet are used to represent chemical elements.