A chemical element or element is a chemical substance consisting of atoms having the same number of protons in their atomic nuclei.In chemistry, a pure element means a substance whose atoms all have the same atomic number, or number of protons.
A chemical element or element is a chemical substance consisting of atoms having the same number of protons in their atomic nuclei (i.e. the same atomic number, Z). In chemistry, a pure element means a substance whose atoms all (or in practice almost all) have the same atomic number, or number of protons. Nuclear scientists, however, define a pure element as one that consists of only one stable isotope. Save. element /ˈɛləmənt/ noun. plural elements. element. /ˈɛləmənt/. noun. plural elements. Learner's definition of ELEMENT. 1. [count] chemistry: one of the basic substances that are made of atoms of only one kind and that cannot be separated by ordinary chemical means into simpler substances. chemical elements. Water is composed of the elements hydrogen and oxygen. Fire is an element. Fire is an element. The definition of an element is one of the substances that constitute all physical matter-wind, air, fire or water, or a natural environment. 1  An example of an element is the fire that cooks the food on a gas range stove. 2  An example of an element is a neighborhood; living in your element. An element is a substance consisting of atoms which all have the same number of protons-i.e. the same atomic number. Elements are chemically the simplest substances and hence cannot be broken down using chemical methods. Elements can only be changed into other elements using nuclear methods. Although an element's atoms must all have the same number of protons, they can have different numbers of neutrons and hence different masses. Element Definition: A chemical element is a substance that cannot be broken down by chemical means. Elements are defined by the number of protons they possess. Examples of Elements: copper, cesium, iron, neon. By Anne Marie Helmenstine, Ph.D.  Tweet. chemistry: one of the basic substances that are made of atoms of only one kind and that cannot be separated by ordinary chemical means into simpler substances. : a particular part of something (such as a situation or activity). : a part of an electrical device that produces heat. noun, plural: elements. (physics, chemistry) A substance that cannot be decomposed into simpler substances by chemical means, and is made up of atoms all with identical number of protons. (general). (1) A fundamental component of a composite entity (such as a vessel element that makes up the vessels in angiosperms). A material factor; a basic component. The term is used to mean one of several parts that unite to form a whole, as in elements of a criminal action or civil action. In the tort of Assault and Battery, an essential element of the offense would be unwanted physical contact. An element of the crime of rape is lack of consent on the part of the victim.  1. A substance that cannot be broken down into simpler substances by chemical means. An element is composed of atoms that have the same atomic number; that is, each atom has the same number of protons in its nucleus as all other atoms of that element. Today 112 elements are known, of which 92 are known to occur in nature, while the remaining 20 have only been made with particle accelerators.
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element definition