ANSWER:

A compound is a substance formed when two or more chemical elements are chemically bonded together. In MIXTURES, the substances present are not chemically bonded together.





Water: two hydrogen atoms bonded to an oxygen atom.

The type of bonds holding elements together in a compound can VARY: two common types are covalent bonds and ionic bonds.

The elements in any compound are ALWAYS present in fixed ratios.

Example 1: Pure water is a compound made from two elements - hydrogen and oxygen. The ratio of hydrogen to oxygen in water is always 2:1. Each molecule of water contains two hydrogen atoms bonded to a single oxygen atom.

Example 2: Pure table salt is a compound made from two elements - SODIUM and chlorine. The ratio of sodium ions to chloride ions in sodium chloride is always 1:1.

Example 3: Pure methane is a compound made from two elements - carbon and hydrogen. The ratio of hydrogen to carbon in methane is always 4:1.

Example 4: Pure glucose is a compound made from three elements - carbon, hydrogen, and oxygen. The ratio of hydrogen to carbon and oxygen in glucose is always 2:1:1.

Compounds can be decomposed chemically into their constituent elements.

Further differences between compounds and mixtures are listed in the definition of mixture.

Explanation:

I hope it helps dear.