EVERYDAY SCIENCE

Detailed explanation-1: -Matter that always has exactly the same composition is classified as a pure substance. Every sample of a given substance has the same properties because a substance has a fixed, uniform composition.

Detailed explanation-2: -1 Answer. A form of matter that always has the same composition is known as a pure substance. Elements and compounds are both examples of pure substances.

Detailed explanation-3: -A compound is a unique substance that forms when two or more elements combine chemically. A compound always has the same elements in the same proportions. The properties of compounds are different from the properties of the elements that form them sometimes very different.

Detailed explanation-4: -Atoms and molecules are all composed of matter. Matter is anything that has mass and takes up space. Matter consist of atoms that are divisible and composed of protons, neutrons and electrons.

Detailed explanation-5: -A homogeneous mixture has the same uniform appearance and composition throughout. Many homogeneous mixtures are commonly referred to as solutions. A heterogeneous mixture consists of visibly different substances or phases. The three phases or states of matter are gas, liquid, and solid.