The Major Differences Between Atom and Molecule You Should Know

The Major Differences between Atom and Molecule

The Major Differences between Atoms and Molecules: If you look around, you will see that there are millions of objects all over you and each of them comprises molecules, which is a combination of two or more atoms attached together. What are the major differences between atoms and molecules is the basic question that comes up in the mind of every scholar of chemistry. Hence, in this article, we will show you the major differences between atoms and molecules.

Atom and Molecule

Atoms and molecules are always present in all objects and living things. The thickness and piece levels shift the thickness and type of items. In gases, molecules are very loosely packed so the molecules can flow around productively without impacting. However, the pressing is more conservative in fluids therefore the particles are in every case together.

A molecule is the little piece of a substance that still has all the properties of a substance. You can break the molecules down further into many atoms, but those will have distinct properties from the main substance.

Molecules are typically made up of two or more smaller structures called atoms which share electrons or exchange electrons in order to be held together. The attachment takes place between the particles in the outer shell of an atom.


An atom is the little particle in an element that has the properties of the element. It is almost possible to break down the atom further holding the properties of the component. Atoms cannot be seen by the naked eye and are the basic building blocks.

An atom also has a nucleus surrounded by electrons which are negatively charged particles. The nucleus consists of neutrons and positively charged protons.

The base of an atom contains a nucleus containing positive protons and neutral neutrons, surrounded by a ‘cloud’ of negative electrons in continuous motion, whose measured energies and geographical distribution.


A molecule is a small unit of matter, which lives in a free state and represents the chemical properties of the substance. Although, when two or more atoms are very close to each other, such that the electrons of the atoms can interrelate with one another, developing  into an attraction between the atoms, called a chemical bond.

The chemical bond occurs as a result of the exchange of electrons between atoms, clearly known as a covalent bond. Hence, when two or more atoms are gathered together as a single unit, with the help of a covalent bond, it forms a molecule.

If one or more identical atoms exist as a unit alone, it is known as a molecule of an element, but if two or more different elements are grouped together in a fixed proportion, by mass, to create a unit that exists smoothly, it is termed as a molecule of a compound.

An Example is: H2O, CO2, NO2, CH4

Major Differences between Atom and Molecule

  • An atom is the tiny particle of a chemical element, which may or may not exist alone, is called an atom. Molecules are the set of atoms held together by a bond, showing the smallest unit of a compound.
  • Molecules exist in a free state while atoms may or may not exist in a free state. 
  • An atom comprises a nucleus and electrons while a molecule consists of two or more, identical or different atoms, bonded chemically.
  • Molecules differ in shape; from linear to angular to triangular. An atom is always spherical in shape.
  • Atoms and molecules aren’t visible through naked eyes, but a molecule can be seen with the help of an enlarging microscope.
  • Atoms are highly responsive while molecules are relatively less responsive.
  • Atoms are held together by nuclear bonds. Molecules are covalently bonded.