Here's a breakdown:

* Atoms: The basic building blocks of matter. They are incredibly tiny particles.

* Mixture: A combination of substances where each substance retains its own chemical properties.

* Chemically Bonded: When atoms share or transfer electrons to form a stable, new substance with properties distinct from the original atoms.

Examples of mixtures of atoms:

* Air: A mixture of nitrogen, oxygen, argon, carbon dioxide, and other gases.

* Saltwater: A mixture of sodium chloride (NaCl) dissolved in water (H2O).

* Sand: A mixture of various minerals, such as quartz, feldspar, and mica.

Key Points:

* The atoms in a mixture are not chemically combined, so they can be separated by physical means (e.g., filtration, evaporation, magnetism).

* Mixtures can have varying compositions.

* Mixtures have properties that are a blend of the properties of the individual components.

In contrast to mixtures, compounds are formed when atoms of different elements chemically bond together. Compounds have new properties that are different from the individual elements. For example, water (H2O) is a compound made from hydrogen and oxygen atoms that have bonded together.