What is the definition of elements?

Answer 1

In physics and chemistry, an element is a substance made of identical atoms, each having the same number of protons in their nuclei. Elements can have isotopes, which are atoms having a different number of neutrons.

An element can also be a constituent part of a larger construction (as with pixels, or picture elements) or specific aspects of a creative form (elements of a novel, or of a plan). In mathematics, an element can be a member, point, or part of a set or form.

In an electric toaster or heater, the term is applied to wires or components that create heat.

Elements are substances that can't be chemically broken down.

a part or aspect of something abstract, especially one that is essential or characteristic.

Answer 2

The term "the elements" is used as a literary synonym of "the weather". The expression "elements" is used militarily to indicate units of larger commands when they are described separately (e.g. "elements of the 34th battalion").

The singular form "element" is applied to uncombined substances having the same atomic form, or to constituent parts of a larger construction, plan, or policy.

(see related question)
An element is any substance that has only one type of atom in it (e.g. aluminium atoms). Every known element is presented on the Periodic Table of the Elements and classified into groups and periods. Some of the elements either never did or don't now naturally occur, and so scientists must synthesise them.

Answer 3

A chemical element is a pure chemical substance consisting of one type of atom distinguished by its atomic number, which is the number of protons in its nucleus.

Answer 4

The chemical element is a substance containing the same types of atoms, with identical number of protons in the atomic nucleus.