Elements.
pure substace
A pure substance
Substance refers to a particular kind of matter with uniform properties, such as an element or compound. It is a fundamental concept in chemistry and is often categorized as either a pure substance or a mixture.
An element is a substance made up of only one type of atom with specific chemical and physical properties. It cannot be broken down further by chemical reactions.
substance.
Matter in a liquid form.
Liquid and gases
a gas
it is called a pure substance
In general use, "substance" refers to a particular kind of matter with uniform properties. In philosophy, it can refer to an individual concrete entity that can exist independently. In the context of addiction, substance refers to drugs or alcohol that are abused or misused.
A change in some properties of matter without forming a different kind of matter is called a physical change. This can involve changes in state, shape, size, or appearance of the substance, but the chemical composition remains the same.
Physical properties are characteristics that can be observed or measured without changing the composition of the substance. When physical properties are altered, such as when a substance changes state (solid to liquid), the basic chemical composition remains the same, indicating that it is still the same kind of matter.