pure substances & Mixures answers
Pure substances are substances that are made up of only one type of atom or molecule. They cannot be broken down further through physical or chemical means. Examples of pure substances include elements, such as oxygen or gold, and compounds, such as water or table salt.
Mixtures, on the other hand, are substances that are made up of two or more different pure substances mixed together. Mixtures can be either homogeneous or heterogeneous. Homogeneous mixtures have a uniform composition and are often called solutions. Example of homogeneous mixtures include salt water or air. Heterogeneous mixtures have a non-uniform composition and the different substances can be seen and easily separated. Examples of heterogeneous mixtures include oil and water or a salad.
In summary, pure substances are made up of only one type of atom or molecule and mixtures are made up of two or more different pure substances mixed together.