[X-ray properties only] X-ray properties of most of the elements.

This WebElements periodic table page contains Essential information for the element ununhexium

adjective. occurring, appearing, or recurring at regular intervals a periodic fever; occurring from time to time; intermittent; of or characterized by periods the periodic motion ...

The Chemistry Division's Periodic Table describes the history, properties, resources, uses, isotopes, forms, costs, and other information for each element.

In mathematics, a periodic function is a function that repeats its values after some definite period has been added to its independent variable. This property is called periodicity.Exam ples · Definition · Aperiodic function · Properties of period · More examples

periodic /pe·ri·od·ic/ (per´e-od´ik) 1. recurring at regular intervals of time. 2. recurring intermittently or occasionally. pe·ri·od·ic (pîr-d k)

adjective . 1. recurring at intervals of time: periodic revivals of an interest in handicrafts. 2. occurring or appearing at regular intervals: periodic visits of a mail steamer to ...

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The periodic table of the chemical elements is a tabular method of displaying the chemical elements. Although precursors to this table exist, its invention is generally credited to Russian chemist Dmitri Mendeleev in 1869. Mendeleev intended the table to illustrate recurring ("periodic& quot;) trends in the properties of the elements.Methods for ... · Arrangement · Periodicity of ... · Structure of the ...

pe·ri·od·ic   (pîr-d k) adj. 1. Having or marked by repeated cycles. 2. Happening or appearing at regular intervals. 3. Recurring or reappearing from time to time ...