Molecules are not elementary particles, and if they are not, why not

No. Elementary particles are an outdated name, when people discovered neutrons, protons, electrons, they thought they were the most basic particles that make up matter, so they were called elementary particles, so molecules are not. But then some other particles were discovered, as well as more basic layers (also called quarks), so the name elementary particles were no longer used, only particles.

A molecule is the smallest particle that can be broken down in a chemical change.

A molecule is a particle.

Molecules are tiny particles that cannot be seen directly by the human eye. A drop of water contains about 15 trillion water molecules. If a person counts one molecule per second and counts it day and night, for 1,000 years, he will only be able to count one in two billionths of all the water molecules in a drop of water.

Molecules are made up of atoms.

Although a molecule is small, it is made up of smaller particles – atoms. Different molecules often contain different numbers of atoms, and some vary considerably, resulting in large differences in relative molecular weight and volume. 1 hydrogen molecule is made up of 2 hydrogen atoms, and the formula is only 18, and these molecules are extremely small.

However, the molecules of proteins and starches are much larger, and their molecules are made up of thousands of atoms and can weigh in the millions.

I'm only reading high 2 Maybe the answer is inaccurate I hope you think about it seriously.

The so-called elementary particles, it depends on the conditions. From a macroscopic point of view, the change in matter (i.e., the change in physics) molecules are elementary particles; But from a microscopic point of view (chemical change, one definition is the rupture of molecules, the recombination of atoms), atoms are elementary ions in turn. That's all I know because of my limited knowledge.

Study hard.

Particles refer to small particles, such as molecules, atoms, and ions.

An atom is the smallest particle in a chemical change, a particle that cannot be divided in a chemical change.

A molecule is the smallest particle that retains the properties of a chemical substance, made up of atoms that are divisible or divisible in chemical changes, with the exception of monoatomic molecules, of course.

Particles refer to some microparticles.

Molecular atoms: one. Molecule.

1.A molecule is a type of particle that makes up matter.

Most substances are made up of molecules. For example, oxygen is made up of oxygen molecules; Water is made up of water molecules; Sulfuric acid is made up of sulfuric acid molecules, etc.

2.A molecule is the smallest particle that maintains the chemical properties of a substance.

1) "Keep" means that each molecule that makes up a substance has the same chemical properties as that substance. For example, the smallest particle that maintains the chemical properties of oxygen is the oxygen molecule.

2) The properties of matter have physical properties and chemical properties, and molecules can only maintain their chemical properties, and cannot be said to be properties of substances, because the physical properties of substances (such as melting point, boiling point, hardness, density, etc.) are all properties of a large number of molecular aggregates of the substance. For example, liquid oxygen formed by the aggregation of a large number of oxygen molecules is pale blue.

3) Molecules are made up of atoms. For example, 1 oxygen molecule is made up of 2 oxygen atoms.

Two. Atom 1An atom is also a type of particle that makes up matter.

Metals, noble gases, diamonds, and graphite are all substances that are directly composed of atoms. For example, mercury is made up of mercury atoms, and helium is made up of helium atoms.

2.Atoms are the smallest particles in chemical change. In a chemical reaction, a molecule can be divided into atoms, but the atoms can no longer be divided into smaller particles in the chemical reaction, but the atoms are recombined into new molecules, which is the essence of chemical reactions.

For example, when red mercury oxide is heated, the mercury oxide molecule is decomposed into oxygen atoms and mercury atoms, and every 2 oxygen atoms combine into 1 oxygen molecule, and many mercury atoms aggregate into metal mercury.

Question 1: Is the atom redivisible or not? In chemistry, there are many particles that participate in chemical reactions, but the smallest unit is the atom. In other words, it is the atom as a whole that participates in chemical reactions.

Whereas, in physics, atoms are made up of protons, electrons, and neutrons. These three particles do not participate in chemical reactions alone, so there is the above, and the atom is the smallest unit in chemistry.

As for the structure of the atom, you will learn the details of the early chain by the third year of high school. Atoms are divided into nuclei and electrons. Electrons move around the nucleus. The ascending nucleus is made up of protons and neutrons.

Question 2: Multiple choice question 1Which of the following particles has been found to prove that atoms are not indivisible particles ( ) aNeutron bProton BA

Problem 3: Atoms are the smallest particles that can no longer be divided. Is this true or wrong from a physical point of view. Atoms can be redivided.

Atoms include positively charged nuclei, uncharged neutrons, and negatively charged electrons. A little more finely divided, there are quarks, which are found in electrons and neutrons. Quarks include upper quarks and lower quarks.

But chemically speaking, it is true. Atoms are the smallest particles in chemical change and cannot be redivided.

There are 3 types of chemical changes: atomic, molecular, and ionic.

Atoms are the smallest particles in chemical change - in chemical change, the smallest particle of matter can only be divided into atoms, but not into protons and neutrons; Atoms can become ions by gaining and losing electrons; Atoms can turn into molecules; Molecules and ions can also be turned into atoms.

Molecules are the smallest particles that maintain the chemical properties of a substance. When the molecule changes, the atoms that make up the molecule will recombine to form a new molecule or atom, at this time, the substance changes, and there is the generation of new substance, which is a chemical change, so the molecule is a particle that maintains the chemical properties of the substance. That is to say:

When the molecule is changed (the molecule is divided to form a new substance), the chemical properties of the substance will change, that is, a chemical reaction will occur.

Although the atom will be divided into the nucleus and the electrons outside the nucleus, and even continue to divide the nucleus into protons and neutrons, this cannot be completed in the chemical reaction, that is to say, the division of the atom does not produce new matter, or the components of the atom itself, so the atom is not a particle that maintains the chemical properties of the substance.

No explanation for ions is given here.

Are the chemical properties of substances maintained by molecules?

Atoms are particles that maintain their chemical properties, and so are molecules, which are made up of atoms. They are of the same order of magnitude.

Particles: All of these things you talk about are called particles, and they are not defined

Molecule: The smallest particle that can be broken down in a chemical change.

Atom: The smallest particle in chemical change (in physics, an atom is made up of the nucleus and electrons outside the nucleus).

Atom: is the smallest particle in a chemical change and is indivisible in a chemical change.

Molecule: is the smallest particle that retains the chemical properties of a substance, and can be redivided in chemical changes.

Particles are small particles, atoms, molecules, electrons, protons, neutrons, etc. are all particles.

To be precise, the molecular formula is the chemistry of the substance.

The smallest bai particle of self-nature. However, some substances, such as metals, are composed of atoms, and the smallest particle that retains its chemical properties is an atom. Here, however, we can look at this atom as a special molecule, a metal molecule.

When a substance undergoes a chemical change, the molecule changes, the original substance does not exist, and the new substance and the original substance have different chemical properties. When a substance undergoes a physical change, the molecule does not change, the substance does not change, and it has exactly the same chemical properties as the original substance. Therefore, the molecule is said to be the smallest particle that "retains the chemical properties of the substance".

A molecule can only maintain the chemical properties of a substance, not the physical properties of a substance.

The essence of chemical change is the recombination of atoms, the original molecule breaks down, and recombines into a new molecule. A molecule is a type of particle that makes up matter, not the only one.

There are also particle clusters that are larger than molecules that are formed by the polymerization of molecules or other particles, such as various functional groups, etc., which also have different chemical properties.

The standard answer here is this:

The particles that maintain the chemical properties of the substance are the [molecules or protomonons]. (Because the types of matter are not the same, atoms can also exhibit chemical properties, most typically metals and noble gases.) ）

The smallest particles that make up matter are atoms. (Atoms can make up matter, or they can be combined into molecules to form matter, but particles like proton neutrons cannot form matter, they need to be pieced together to form matter.) ）

That's how the standard answer when marking the paper is written.

This sentence has the original sentence in the book.

In substances made of molecules, molecules are the smallest particles that maintain the chemical properties of the substance, and atoms are the smallest particles of ions that maintain the chemical properties of the substance, so it is more complicated and will not be discussed in junior high school.

So fill in the atoms.

If it is elemental, the particle that retains the chemical properties of the substance is an atom, so it must be calculated, I think it is filled with atoms.

All metals and noble gases and most solid elements are composed of atoms, which is enough to show that the smallest particles that maintain the chemical properties of matter are atoms.

The atoms are chemically bonded with each other (chemical bond, covalent bond, metallic bond) and hydrogen bond, and the atom is all divided

sub-composed of bricks.

Particle only dao is a general term that is too broad in scope. In the physical sciences, particles are objects that occupy a tiny localized area and can be described in terms of several physical or chemical properties, such as volume or mass.

The number in the figure represents the smallest unit of indivisible positive and negative electromagnetic information - qubits (Qubit) (name physicist John. Wheeler John Wheeler famously said, "It from bit."

After the development of quantum information research, this concept was sublimated to the point that everything originates from qubits) Note: Bits are bits.

The molecule is made up of protobaitons, and the atom has protons, neutrons, and electrons in it, and the electrons revolve around the proton neutron. The protomonons that lose some of the electrons in the outermost DAO are called ions.

Genus. Difference Between Ion and Atom:

The structure is different. The number of protons in the nucleus of an atom is equal to the number of electrons outside the nucleus, and the number of electrons in the outermost shell does not reach a stable structure (except for noble gases); The number of protons in the nucleus of an ion is greater or less than the number of electrons outside the nucleus, and the number of electrons in the outermost shell mostly reaches 8 electrons stable structure.

The electrical properties are different. The total number of positive charges in the nucleus of an atom is equal to the total number of negative charges outside the nucleus, so the atom is not electrically charged, and the electrogeny is an important sign that distinguishes ions from atoms. Since the number of positive charges in the cation nucleus is greater than the total number of negative charges outside the nucleus, it is positively charged. Anions, on the contrary, are electronegative.

The nature is different. The different structures and electrical properties determine the different properties of atoms and ions. For example, sodium metal, which is composed of sodium atoms, can react violently with water; Sodium ions, on the other hand, do not react with water, while sodium ions do not react with water and can move freely in water.

Atomic connection: Since ions are made by atoms that gain (or lose) electrons, the nuclear charge number of atoms and ions is the same, and particles belonging to the same element, such as chlorine atom Cl and chloride ion Cl- are different states of existence of chlorine elements.