periodic table

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)
www.psigate.ac.uk/newsite/reference/periodic-table.html
www.colorado.edu/physics/2000/applets/a2.html

Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

periodic table

[¦pir·ē¦äd·ik ′tā·bəl]

(chemistry)

A table of the elements, written in sequence in the order of atomic number or atomic weight and arranged in horizontal rows (periods) and vertical columns (groups) to illustrate the occurrence of similarities in the properties of the elements as a periodic function of the sequence.

periodic table

A list of all chemical elements known to mankind sorted by the number of protons they contain within the atom. As of 2021, there are 118 elements starting with hydrogen, which has one proton. The first 94 are found in nature, while the remaining are synthesized in a lab.

What's Periodic About It?
Periodicity is a chemistry term that refers to the behavior of the elements based on the number of protons in the atom. For the world at large, an "element table" makes more sense. See atom.

Copyright © 1981-2025 by The Computer Language Company Inc. All Rights reserved. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction is strictly prohibited without permission from the publisher.

Mentioned in

References in periodicals archive

In this paper, we will present a theoretical approach, based on the theory of finite periodic systems [17-23] (TFPS) that will allow a precise calculation of transmission coefficients and transmission phase times through finite fiber Bragg gratings.

An Improved Theoretical Approach to Study Electromagnetic Waves through Fiber Bragg Gratings

Deviations from the sequence of filling the periodic system (e.g.,

On the descriptive geometric interpretation of Pauli Principle, elements of the Mendeleev table of chemical elements, and the Newtonian laminar current of a liquid

Scerri's book turns to the discoveries in modern physics that were to have a big impact on the periodic system, while still leaving the system essentially intact.

The periodic table on tour

This ensures that the control system behaves as a periodic system.

On-line feedback control for optimal periodic control problems

FLiPS (Flexible Learning In the Periodic System) (Mishra, 1998; Mishra, Zhao & Tan, 1999) is a web-based multimedia hypertext designed to help students develop a deeper understanding of complex (and often hard to learn) concepts in chemistry.

Component architectures and web-based learning environments (1)

When did you last perform routine and periodic system tests required by the National Elevator Code ASME A17.1, or other jurisdiction?

Elevators and electrolysis: a potential liability issue for hydraulic elevators

Compared to the revolutionary or periodic system of dealing with change, the evolutionary or "continuous motion strategy" seems more likely to be successful by maintaining a current state.

Building for tomorrow: In a changing world, constant motion toward a defined vision is the key to organizational success

Saylor, The Optical Properties, Densities, and Solubilities of the Normal Formates of some Metals of Group II of the Periodic System, J.

Towards near perfect crystals with only well-characterized imperfections

Periodic system and process reviews can improve any businesses' operations.

A Roadmap to Efficiency

Elementary Order: Mendeleev's Periodic System. Translated by N.

DIMITRI IVANOVICH MENDELEEV