There are three types of matter according to the shape; solid, liquid, and gas. But hey, there is also another classification of matter! You can categorize matter into ELEMENT, COMPOUND, …

A chemical compound is a chemical substance composed of many identical molecules (or molecular entities) containing atoms from more than one chemical element held together by …

Examples of elements include iron, copper, hydrogen and oxygen. Examples of compounds include water (H 2 O) and salt (Sodium Chloride - NaCl). Elements are listed according to their …

Dec 16, 2025 · A sample of any given pure element is composed only of the atoms characteristic of that element, and the atoms of each element are unique. For example, the atoms that …

Learn what elements and compounds are in chemistry, see clear examples, and understand differences for easy exam revision.

Compounds form when two or more elements chemically combine in fixed ratios. Take water (H₂O) as an example; it consists of two hydrogen atoms and one oxygen atom. Another …

Aug 24, 2025 · Unlike individual elements, which are pure substances made of only one type of atom, a compound always contains atoms from at least two distinct elements. For example, …

Unique Properties: A compound has physical and chemical properties that are different from its constituents. For example, sodium is a soft, reactive metal, and chlorine is a poisonous gas.

Apr 5, 2025 · Compounds: When Elements Bond Together. A compound forms when two or more different elements chemically combine in a fixed ratio. The resulting substance has entirely …

Learn how substances are combined, bonded, and separated, with examples to support key comparisons.