What is the difference between a mixture of two elements and a compound formed from the two elements?

A mixture is a combination of two or more substances that are not chemically combined. These substances in a mixture retain their own chemical properties and can be separated by physical methods such as filtering, evaporation or decantation.

A compound is a substance consisting of two or more elements chemically combined together in fixed proportions. Compounds have unique properties which are different from their individual constituent elements and can only be separated into their individual elements by chemical methods such as electrolysis, chemical reactions, etc.

There are several key differences between a mixture and a compound: 1. Composition: Mixtures can contain varying proportions of their constituent substances, whereas compounds have their constituent elements present in fixed proportions. 2. Properties: The substances in a mixture retain their individual properties, while a compound has distinct properties that are different from those of its constituent elements. 3. Separation: Mixtures can be separated into their individual components using physical methods, while compounds can only be separated into their constituent elements using chemical methods. 4. Formation: Mixtures are formed by the simple mixing of substances, whereas compounds are formed through chemical reactions.

Examples of Mixtures: - A mixture of sand and water - A mixture of sugar and salt Examples of Compounds: - Water (H\(_2\)O), which is formed by the chemical combination of hydrogen and oxygen. - Sodium chloride (NaCl), which is formed by the chemical combination of sodium and chlorine. In conclusion, a mixture is a combination of two or more substances that are not chemically combined and can be separated by physical methods, whereas a compound is formed by the chemical combination of elements in fixed proportions and can only be separated by chemical methods.