Difference Between Molecule and Atom What is the difference between atom and molecule?

Matter is made up of three types of particles. i.e. ions (which can be ignored here). Atoms, molecules...

Metallic elements and noble gases, as well as sulfur, phosphorus, carbon (diamond), etc., are directly composed of atoms... Other non-metallic gases are made up of molecules... It is true that atoms can make up molecules.

Molecules can make up certain substances. But it does not mean that atoms can directly form certain substances ... You can think of oxygen as a watermelon patch...

One by one, the oxygen molecule is regarded as a watermelon. And the oxygen atom is the watermelon seed. Can you say that a watermelon field is made up of many watermelon seeds?

Also, pay attention to the wording. In chemistry, the words composition and composition are very particular... Composition is a micro concept.

is a description of a substance made up of certain particles (i.e. atoms. Molecule. ions, etc.).

And the composition is a macro concept. It describes that matter is composed of certain elements and has little relationship with molecular atoms. The chemical formula O2 (which cannot be said to be a chemical symbol) has many meanings such as 1

Can stand for Oxygen 2Can represent an oxygen molecule 3 can state that oxygen is made up of the element oxygen. 4. The oxygen molecule is made up of oxygen atoms5. An oxygen molecule is made up of 2 oxygen atoms (the number is also to be emphasized) There are many things to pay attention to in the discipline of chemistry.

Hope these help you.

The chemical symbol O2 is the oxygen molecule that represents two oxygen atoms, and the oxygen molecule makes up oxygen. Because molecules are made up of atoms. Molecules are constituent substances, and there are substances that are composed of atoms.

Just 1 letter o mn k then this is the atom (element).There are a lot of concepts in the book, so if you can't do it, ask the teacher. ！

If you don't understand, you must ask psThe atoms are small if oxygen is made up of two oxygen atoms. You see if there's a problem.

This kind of wordplay doesn't have to be too mindful.

Macroscopic concept --- composition--- oxygen --- is made up of molecules or atoms or particles.

The microscopic concept --- composed of three oxygen molecules--- 3O2--- molecules are composed of atoms, atoms are composed of protons, neutrons (optional), and electrons.

A molecule of KMNO4 is composed of one potassium atom, one manganese atom, and four oxygen atoms.

O2 has both the macroscopic concept of oxygen and the microscopic concept of an oxygen molecule.

3O2 chemistry is preceded by a number that only has a microscopic concept.

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1. The size is different.

Atom: refers to the basic micro-particles that are inseparable from chemical reactions, and atoms are inseparable in chemical reactions.

Molecule: It is a whole composed of atoms arranged in a certain bonding order and space, and this bonding order and spatial arrangement is called molecular structure.

Proton: A proton is a subatomic particle with a positive charge of 10-19 coulombs (c), electron: the earliest elementary particle discovered.

Quantum: If there is the smallest indivisible fundamental unit of a physical quantity, the physical quantity is quantized, and the smallest unit is called quantum.

Particle : refers to the smallest component of matter that can exist in a free state.

2. The composition is different.

Proto-buried burner: An atom is made up of a nucleus and electrons moving around the nucleus.

Molecule: A molecule is composed of atoms, which are combined into atoms in a certain order and arrangement through a certain force.

Protons: Protons belong to the baryon class and are made up of two upper quarks and one lower quark through gluons under strong interaction.

Electrons: All atoms are made up of a positively charged nucleus and a number of electrons moving around it.

Quantum: An indivisible and fundamental entity.

Particles: Different particles, made up of different compositions.

Extended Notes: The Particle Discovery Journey.

In 1897, Thomson discovered the electron, and in 1911, Rutherford proposed the nuclear structure of the atom. Then we discovered photons, and thought that "photons, electrons, protons, and neutrons" were indivisible particles that made up matter, so we called them "elementary particles".

At the end of the 19th century, atoms were considered to be the smallest particles that make up matter. After the discovery of electrons, protons, and neutrons, many people believed that photons and them were the "elementary particles" that make up matter.

Hundreds of new particles that are not composed of protons, neutrons, and electrons were gradually discovered; It was also discovered that protons, neutrons, etc., also have their own complex structures. Since the second half of the 20th century, the word "basic" has been removed and collectively referred to as particles.

Since the 30s of the 20th century, some new particles have been discovered in the study of cosmic rays.

In 1932, the positron was discovered;

In 1937 the child was discovered;

In 1947, the k-meson and meson were discovered;

Later some particles were also discovered with masses greater than the masses of protons.

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.

The difference between a bridge chion and an atom is described as follows:

The difference is: whether it can be divided again, the order of magnitude is different, and the structure is different.

1. Whether it can be redivided: in chemical changes, molecules can be redivided and will change; In chemical change, atoms cannot be divided, do not become other atoms, and can only be recombined.

2. The order of magnitude is different: the order of magnitude of the general molecular diameter is 10 -10m, the molecule is very small, but has a certain volume and mass, the molecular properties of the same substance are the same, and the molecular properties of different substances are different. The order of magnitude of the atomic diameter is about 10 m.

The mass of the atom is extremely small, and the mass is mainly concentrated in protons and neutrons.

3. Different structures: molecules are composed of atoms bound together in a certain bonding order and spatial arrangement, which is called molecular structure; Atoms refer to the basic particles that are inseparable from chemical reactions, and atoms are inseparable in the chemically sensitized reaction.

4. Atoms are also a kind of particles that make up matter, and atoms are constantly moving, although the atoms are small, they also have a certain mass.

5. Each molecule that constitutes a substance is consistent with the chemical properties of the substance, and the molecule can only maintain the chemical properties of the substance, but not the physical properties of the substance. Minimum is not the smallest in the absolute sense, but the minimum that maintains the chemical properties of the substance.

For a substance made up of molecules, the molecule is the smallest particle that retains its chemical properties. When a substance undergoes a physical change, the molecule itself does not change, and it is still the original molecule. In the case of a chemical change, the molecules of the substance themselves change, the molecules are divided into atoms, and the atoms are reassembled.

In a chemical change, atoms cannot be redivided, so atoms are the smallest particles in chemical changes.