A periodic table wall chart created to celebrate the International Year of Chemistry is available on Flinn Scientific. This chart features 112 elements, and each element is showcased in a full-colour image that includes its atomic number and symbol.
A periodic table is an organization of chemical elements in tabular form, not including mixtures, compounds or subatomic particles. The elements are arranged in a grid of 18 columns and 17 rows, with a double row of elements below the main grid. The periodic table gets its name from the name of the rows, which are called "periods." The atomic number of each element represents the number of protons in the nucleus. The number of neutrons among different elements varies, and each variation is known as an isotope.
The columns of the table are known as "groups." Some groups have similar properties and have names such as halogens or noble gases. Elements are arranged according to their atomic number, electron configuration and recurring properties. In 1869, Dmitri Mendeleev published the first widely recognized periodic table.
In addition to displaying information about currently known elements, the periodic table can be used to predict the properties of new elements. Elements with atomic numbers from one (hydrogen) to 118 (ununoctium) have been discovered or synthesized. The first 98 elements are found in nature, whereas elements with atomic numbers of 99 to 118 have only been produced via laboratory synthesis.