periodic table

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periodic table

a systematic arrangement of the chemical elements. An earlier version was devised in 1869 by Dmitri Ivanovich Mendeleev (Russian chemist, 1834-1907). By arranging the elements in order of their atomic weights, he was able to show relationships, such as valency, that occurred at regular intervals and was able to predict the properties of elements still undiscovered in the nineteenth century.

per·i·od·ic ta·ble

(pēr'ē-od'ik tā'bĕl)
A graphic arrangement of chemical elements by atomic number and chemical properties.

periodic table

A chart with the chemical elements arranged by their atomic numbers.
See: periodic law
See also: table

periodic table,

n a pictorial representation of all chemical elements arranged by increasing order of atomic numbers. Periods and groups are the primary classifications found within the table.
References in periodicals archive ?
The textbook includes an appendix that covers the tabulated values of physical and mechanical properties, a periodic chart of the elements, units and conversion factors, and the longevity of restorations commonly used in dentistry.
It wasn't only the periodic chart he had taught us, but how to be a decent person with a value system in an immoral world.
Although the elements of the chemist's periodic chart are ostensibly his focus, he is a wonderful writer on whatever subject, and one soon comes to trust him to locate living matter in any compound of experience.