The Periodic table is a chart used primarily by chemists It summarises the elements by arranging them in the order of their atomic number in such a way that similarities and trends can be appreciated Each row (or PERIOD of the table) exhibits a range of properties that can be interpreted by how the electron orbitals of the atom are filled Each column or GROUP of elements exhibits similar properties (like a family show similar characteristics)
Grouping of the known elements by their number of protons There are many other trends such as size of elements and electronegativity that are easily expressed in terms of the periodic table
a table in which the elements are commonly arranged in order of increasing atomic number Elements of similar properties are placed one under the other, yielding eight families or groups of elements Within each group there is a gradation of chemical and physical properties, but in general a similarity of chemical behavior From group to group, however, there is a progressive shift of chemical behavior from one end of the table to the other
The periodic table is a chart of all the known elements in order of increasing atomic number The table puts elements into groups with similar characteristics, allowing us to recognize trends over the whole array of elements
An arrangement of the chemical elements, according to their atomic numbers, in vertical columns having similar properties and rows showing shifts in properties back
A chart of the elements, arranged according to their atomic numbers Elements with similar physical and chemical properties and similar electron arrangements are in the same column
An ordering of the chemical elements by rows and columns according to the filling of electrons in energy shells; also related to atomic numbers and the chemical properties of elements
A matrix in which the elements are arranged across rows in order of increasing atomic number so that elements with similar chemical properties fall in the same vertical column
In chemistry, the periodic table is a table showing the chemical elements arranged according to their atomic numbers. A tabular arrangement of the elements according to their atomic numbers so that elements with similar properties are in the same column. a list of elements (=simple chemical substances) arranged according to their atomic structure. Organized array of all the chemical elements in approximately increasing order of their atomic weight. They show a periodic recurrence of certain properties, first discovered in 1869 by Dmitry I. Mendeleyev. Those in the same column (group) of the table as usually arranged have similar properties. In the 20th century, when the structure of atoms was understood, the table was seen to precisely reflect increasing order of atomic number. Members of the same group in the table have the same number of electrons in the outermost shells of their atoms and form bonds of the same type, usually with the same valence; the noble gases, with full outer shells, generally do not form bonds. The periodic table has thus greatly deepened understanding of bonding and chemical behaviour. It also allowed the prediction of new elements, many of which were later discovered or synthesized