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 electronegativity.

Nov 29, 2025 · A chemical element is any substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements are the fundamental materials of which all …

An element is the basic chemical building block of matter; it is the simplest chemical substance. Elements vary from being a small percentage to more than 30% of the atoms around us.

Nov 15, 2025 · Elements are pure substances that cannot be broken down (or decomposed) into simpler substances by chemical changes or chemical reactions. Each element has a definite atomic number …

Learn about the structure of the atom, and how atoms make up matter. An atom is the smallest unit of matter that retains all of the chemical properties of an element.

Oct 17, 2020 · At present, there are 118 known elements. If atoms of an element carry an electrical charge, they are called ions. Atoms of an element with different numbers of neutrons are called …

Apr 20, 2025 · In this article, we’ll take a journey into the heart of the Periodic Table, exploring its origins, structure, significance, and how it provides insight into the nature of atoms and the elements …

Jul 23, 2025 · Element in chemistry are substances that cannot be broken down into simpler substances by any chemical method by the application of heat or light. For instance, melting a piece of gold still …

Use these resources to examine the properties and uses of elements and compounds.

6 days ago · There are 118 elements on the periodic table. The elements are arranged in order of increasing atomic number, which is the number of protons in that atom’s nucleus. Hydrogen, the …