The Concept Of Matter In Chemistry

All that surrounds you is about the matter. Compounds and atoms all consist of very tiny bits of matter. Such atoms keep developing the everyday things that you can see and feel. The matter is described as something that requires space and has mass & volume.

Though the matter is located in the Universe, it is possible to experience only a few states of matter. Each of those states is also labelled as a phase. There are several other states of matter which appear in extreme conditions. As we continue analysing the Universe, scientists are likely to determine more state of matter.

Various Types Of States Of Matter

The primary states of matters are solid, liquid and gas. Scientists already spoke about these three types of matters. Let us discuss the characteristics of various kinds of states of matters. The different states of matter are based on the arrangement of molecules in the substance, so here comes the question: what is a molecule. A molecule is described as the smallest unit of a material which comprises the compound’s chemical properties. The molecules are composed of atom groups.


One of the primary forms of matter is Solid State. Solids differ from liquids and gases because of their stiffness characteristics. Due to strong intermolecular forces of attraction, the molecules of the solid are tightly packed, and they vibrate only from their mean positions. But gases & liquids have the fluidity properties and can move smoothly. Solids experience the minimum thermal expansion and compressibility.

Definition of Solid: Solids can be described as the state of matter with a defined volume and shape, and have a highly rigid structure.


Sand. Rock, Iron, Brick and so on.


Due to weak intermolecular forces of attraction, the particles inside a liquid are tightly packed. Such forces are weaker than solids but stronger than gases, and there is plenty of gap between the liquid molecules that facilitate the moving capacity. Fluids can obtain a vessel’s shape easily, and also their volume is fixed. Transformation of solids to fluids occurs when we raise the solid temperature to a point in which solids start to melt, and the fluid density generally lies between the solid and gas densities. Also, liquid compressibility and thermal expansion are slightly higher than solids.

Definition: A liquid is a form of matter that takes the shape of a reservoir where it is kept and in the existence of gravity, obtains a given surface.


Oil at room temperature, water at room temperature and alcohol at room temperature, etc.


Distances between the molecules which are intermolecular distances are significant in this type of state of matter. The intermolecular force of attraction observed among them is minimal. The vibratory, translatory & rotary movement is commonly found in gases. Gasses have no fixed form or volume, and they also have highly compressible and thermal expansion.

Definition: A gas is a form of matter that takes the shape of a vessel in which it is stored. Gases possess a uniform density within the vessel in the existence of gravity & irrespective of the quantity of material contained.


Nitrogen, oxygen, hydrogen and so on.