For elements with no stable isotopes, the mass number of the isotope with the longest half-life is in parentheses.

Like the periodic table, the list below organizes the elements by the number of protons in their atoms; it can also be organized by other properties, such as atomic weight, density, and …

Interactive periodic table with up-to-date element property data collected from authoritative sources. Look up chemical element names, symbols, atomic masses and other properties, …

May 17, 2014 · This element list includes the names, symbols, and atomic numbers of all 118 chemical elements, arranged in order of increasing atomic number. The atomic number is the …

Oct 27, 2025 · Periodic table, in chemistry, is an organized array of all the chemical elements in order of increasing atomic number. When the elements are thus arranged, there is a recurring …

Explore the chemical elements through this periodic table ... The standard form of the periodic table shown here includes periods (shown horizontally) and groups (shown vertically).

There are 118 elements on the periodic table. Here's a list of all of the chemical elements of the periodic table ordered by increasing atomic number.

This page explains that a chemical element is a basic substance that cannot be divided further, with 118 recognized elements, 90 naturally occurring. Hydrogen and helium are the most …

Elements: The Periodic Table provides comprehensive and useful information about the chemical elements all in one place.

ELEMENT definition: 1. a part of something: 2. a small amount of an emotion or quality: 3. a simple substance that…. Learn more.