periodic table

[ peer-ee-od-ik, peer- ]

noun

, Chemistry.

1. a table illustrating the periodic system, in which the chemical elements, formerly arranged in the order of their atomic weights and now according to their atomic numbers, are shown in related groups.

periodic table

/ ˌpɪərɪˈɒdɪk /

noun

1. a table of the elements, arranged in order of increasing atomic number, based on the periodic law. Elements having similar chemical properties and electronic structures appear in vertical columns (groups)

Periodic Table

1. A table in which the chemical elements are arranged in order of increasing atomic number. Elements with similar properties are arranged in the same column (called a group), and elements with the same number of electron shells are arranged in the same row (called a period).

Word History and Origins

Origin of periodic table¹

First recorded in 1890–95

Example Sentences

Scientists can now begin to bridge the gap between the earliest and final stages of binary star systems -- two stars that orbit a shared center of gravity -- to further our understanding of how stars form, how galaxies evolve, and how most elements on the periodic table were created.

From Science Daily

Fluorine is perhaps one of the most controversial elements on the periodic table.

From Salon

Quarks and gluons are the fundamental building blocks of protons and neutrons -- elementary particles that combined to forge the basic elements of the periodic table.

From Science Daily

As the lightest element in the periodic table, hydrogen rises and collects in a cloud under the tunnel ceiling.

From Science Daily

Professor Andrew Cooper from the University of Liverpool's Department of Chemistry and Materials Innovation Factory in Liverpool said: "This work opens up a range of possibilities. Our approach uses non-metal anions as nodes to build frameworks rather than metal cations in MOFs. There are more anions available than there are metals in the periodic table, so the space to search for new materials is huge."

From Science Daily