What is the difference between an atom and a molecule, and what is the difference between a molecule

The similarities between molecules and atoms are: Molecules and atoms are both basic particles that make up matter. Some substances are made up of molecules.

For example, oxygen is made up of oxygen molecules; Carbon dioxide is made up of carbon dioxide molecules. Some substances are made up of atoms. For example, diamond is made up of carbon atoms.

Both the molecules and atoms are small in size. Both the molecule and the atomic mass are small but there is still mass like a water molecule has a mass of kg and an oxygen atom has a mass of kg. Molecules and atoms are in constant motion.

There is a certain interval between molecules and atoms. The tri-state changes of matter under different conditions are mainly due to the change in the size of the intermolecular or interatomic spacing. Both molecules and atoms are divisible and inseparable.

There are interactions between molecules and atoms. For example, oxygen and hydrogen are gases at room temperature, which can condense into liquids when pressurized and cooled, and can further solidify into solids. This shows that there is an interaction between molecules, and the magnitude of the action is related to the distance and mass between molecules, and in addition, every two oxygen atoms can be combined into one oxygen molecule, and each oxygen molecule cannot be separated into two oxygen atoms under normal circumstances.

This shows that there are interactions between atoms as well. The differences are: In a chemical reaction, a molecule is broken down into atoms, but the atoms can no longer be divided.

Molecules can exist independently, but atoms generally cannot exist independently. Point of contact: Molecules are made up of atoms.

An atom is a particle that makes up a molecule, and an atom is also a kind of particle that directly makes up matter.

Atoms are the smallest particles that cannot be redivided in a chemical reaction, and they can be redivided when they are molecules.

Molecules are made up of atoms, so atoms are smaller than molecules! ~

An atom is the smallest unit that makes up an element and a molecule is made up of atoms.

An atom is larger than a molecule, and an atom is a small unit.

Molecules and atoms are both particles that make up matter, very small in mass and volume, separated from each other, and constantly moving, both of which are different in type and number, and are not electrically apparent. So do you know the difference?

Essential differences

In chemical change, molecules are divisible and atoms are indivisible. A molecule is the smallest particle that retains its chemical properties, and in a chemical change, the molecule becomes an atom, and the atom rejoins, and the atom is the smallest particle in the chemical change.

The composition structure is different

Atoms are made up of protons and neutrons, the nucleus of a positive atom is made up of positively charged protons and electrically neutral neutrons, and the antiprotons in the nucleus of a negative atom are negatively charged, thus making the nucleus of a negative atom negatively charged. Molecules, on the other hand, are made up of atoms, which are bound together into molecules in a certain order and arrangement through a certain force.

The nature of the chemical reaction involved is different

Atoms are the basic particles that are inseparable from chemical reactions, and atoms are inseparable in chemical reactions. Molecules can be redivided in chemical reactions, and various atoms in the molecules of different substances are recombined.

Historical developments are different

The formulation of atoms predates molecules. In 1789, the French scientist Lavoisier defined the term atom, and since then, the atom has been used to denote the smallest unit of chemical change. And the first to propose the exact concept of the molecule was Avogadro, who published the molecular doctrine in 1811, arguing:

An atom is the smallest particle that participates in a chemical reaction, while a molecule is the smallest particle that a single substance or compound can exist independently in the free state.

First, the structure is different:

A molecule is a whole that is bound together by the atoms that are composed of atoms according to a certain bonding order and spatial arrangement, and this bonding order and spatial arrangement relationship is called molecular structure. Due to the interaction between atoms within a molecule, the physical and chemical properties of a molecule depend not only on the type and number of constituent atoms, but also on the structure of the molecule.

Atoms refer to the basic particles that are inseparable from chemical reactions, and atoms are inseparable in chemical reactions. But in the physical state it can be divided, and an atom consists of a nucleus and electrons moving around the nucleus. Atoms are made up of electrons, protons, and neutrons (hydrogen atoms are made up of protons and electrons).

Second, the physical properties are different

All the molecules that make up matter are in a never-ending irregular motion. The higher the temperature, the faster the molecular diffusion, and in solids, liquids, and gases, the gas diffusion is the fastest. Since the motion of molecules is related to temperature, this motion is called the thermal motion of molecules.

For example, clothes are easy to dry in hot weather, and the molecular diameter is generally on the order of 10 -10m. The molecule is small but has a certain volume and mass.

The mass of the atom is very small and it is constantly moving irregularly. There are intervals between atoms, and the properties of the same kind of atoms are the same, and the properties of different kinds of atoms are different. Each element has one or more isotopes that have unstable nuclei that allow for radioactive decay, in which the nuclei can emit particles or electromagnetic radiation.

Third, the chemical properties are different

Molecules have a certain size and mass; There is a certain interval between molecules; Molecules are in constant motion; There is a certain force between molecules; Molecules can be made up of matter, and molecules can also be divided into smaller particles: atoms in chemical changes. Molecules can be converted into each other in the 3 states with the change of temperature.

Electrons are distributed outside the nucleus to produce a spectrum of electron transitions, which determine the chemical properties of an element and have a great influence on the magnetic properties of the atom. All atoms with the same number of protons make up elements, each with at least one unstable isotope, that can undergo radioactive decay.