How are elements different from chemical compounds?

Elements and chemical compounds are fundamental concepts in chemistry, distinguished primarily by their composition and ability to be broken down.12

Chemical Elements

A chemical element is a substance that cannot be decomposed into simpler substances by ordinary chemical processes. Elements serve as the fundamental building blocks of all matter in the universe. A sample of a pure element consists entirely of unique atoms characterized by a specific number of protons, known as its atomic number.314

Chemical Compounds

A chemical compound is a substance composed of two or more different chemical elements that have combined in fixed ratios. Unlike elements, compounds can be broken down into their constituent elements through chemical reactions.1

The relationship between the two can be compared to the alphabet: just as letters combine to form words, the atoms of various elements combine to form a vast array of chemical compounds. These compounds are categorized into types, such as molecular (covalent) and ionic compounds, depending on how their atoms or ions are held together.1