The periodic table is a tabular arrangement of the chemical elements, ordered by their atomic number (number of protons), electron configurations, and

How is the periodic table like the map you used on your last road trip? In this lesson, you will be introduced to the periodic table, the road map of chemists.

A period is one of the horizontal rows in the periodic table, all of whose elements have the same number of electron shells. Going across a period, each element has

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

This WebElements periodic table page contains the essentials for the element beryllium

Aug 09, 2016 · Question: What Is the Difference Between an Element Group and Period? Groups and periods are two ways of categorizing elements on the periodic table.

More Periodic Table Group Period images

Interactive periodic table. Clicking on an element brings up a list of general properties and data, and information on its discovery, history, uses, geologic

Interactive periodic table with dynamic layouts showing names, electrons, oxidation, trend visualization, orbitals, isotopes, and compound search.

Periods and Groups. Elements in the periodic table are arranged in periods (rows) and groups (columns). Atomic number increases as you move across a row or