What does a chemical refer to and what does a chemical mean

The specific designation of the concept of "matter" varies depending on the discipline [1]. In chemistry, a substance is any organic or inorganic substance identified by a specific molecule, including: (1) a substance that is produced in whole or in part as a result of a chemical reaction or any compound of a naturally occurring substance; (2) Any element or non-combined atomic cluster.

Chemical substances include elements, compounds (including additives and impurities), by-products, reaction intermediates and polymers. However, it does not include mixtures, products (agents) and articles. Molecules can exist independently, which is to maintain the chemical properties of the substance.

of the smallest particles. Atoms are the smallest particles in a chemical change, and in a chemical reaction, the atoms are recombined into a new substance. The atoms pass through chemical bonds with each other.

Combine to form molecules. Ions are charged atoms or clusters of atoms.

Chemistry is the study of the composition, properties, structure and changes of matter at the molecular and atomic levels.

The object of chemistry is matter, and he not only studies existing matter, but also creates new matter from existing matter.

That's why I think anything that exists in nature can be called a chemical.

Strictly speaking, any substance is a chemical substance because it is made up of atoms, molecules through chemical bonds. However, when people talk about chemical substances, they specifically refer to synthetic substances.

There is an opinion that synthetic substances, inferior to natural ones, are incorrect. Through the knowledge of chemistry, human beings have transformed the world and made it more perfect.

A chemical substance is a substance composed of atoms or molecules with fixed chemical properties. Chemicals can be found everywhere in everyday life, including water, salt, sugar, oxygen, carbon dioxide, and more. Chemical substances can be classified according to different classifications, and the following will introduce chemical substances in four aspects: elements, compounds, materials, and reactions.

An element refers to a substance that is made up of an atom that has the same atomic number and chemical properties. Elements are the basic building blocks of chemical substances, and there are currently 118 known elements, of which 92 are naturally occurring, and the rest are synthetic. Elements can be classified according to the way the periodic table is classified, and each element has its own unique physical and chemical properties.

A compound is a substance that is formed by the combination of two or more elements, and their chemical properties are different from the elements that make them up. Compounds can exist in molecular form, such as water, carbon dioxide, ethanol, etc., or in ionic form, such as food salt, sulfuric acid, sodium hydroxide, etc. The formation of compounds is due to chemical reactions between elements such as oxidation, reduction of thick pants, acid-base reactions, and many more.

Materials refer to substances with certain structures and properties, they are macromolecules or polymers composed of chemical substances. Materials can be classified according to structure, including crystalline, amorphous, polycrystalline, and so on. The properties of a material depend on the chemicals it is composed of and its structural characteristics, such as metals, plastics, ceramics, glass, and many more.

A reaction refers to the chemical change that occurs between chemical substances, and this change can be expressed by a chemical equation. A chemical reaction can be exothermic or endothermic, oxidation, or reduction. Chemical reactions are the basis for chemical substances to be used in production, manufacturing, environmental protection and medicine.

In conclusion, chemicals are the basic building blocks of all things, and they play an important role in various fields. The understanding and application of chemical substances helps us better understand the natural world and advance science and technology.

Chemistry explained.

chemistry]

The study of the composition, structure and properties of matter and its transformation is explained in detail (1).The science that studies the composition, structure, properties, and laws of change of matter is a basic discipline in the natural sciences. (2).

Refers to celluloid . For example, this comb is chemical.

Word pretense and slang decomposition.

Interpretation of 化 à nature or form change and eliminate : change. Split apart.

Rigidity. Teaching. Melt.

Melt. Exert a subtle influence on. Turn dry into jade silk.

Buddhists and Taoists collect money: turning into a relationship. Fasting.

It is used after the noun or the word "hall bridge" to indicate the transformation into a certain nature or state: ugliness. Greening.

Customs, Interpretation of Style, Learning, Imitation, Delving into Knowledge, Acquiring Knowledge, Reading: Student. Apprentice.

Learn. Academic. Xueyou.

Scholar. Learn the valve. Academic.

Degree. Toddler Handan (ridicule that people only know imitation, are not good at learning and have no achievements, also known as "Handan toddler"). Where knowledge is imparted:

School (abbreviated as "Learning".)

Explanation of chemical properties.

The properties of a substance when it undergoes a chemical change, such as acidity, alkalinity, chemical stability, etc.

Word decomposition Interpretation of chemistry Detailed explanation of the study of the discipline of the ruler composition, structure and properties of substances and their transformation. The science that studies the composition, structure, properties, and laws of change of matter is a basic discipline in the natural sciences. Refers to celluloid .

For example, this comb is chemical. Explanation of the nature of the

Temperament; Temperament. "Xunzi Sexual Evil": "Although Mrs. has a beautiful nature and a discerning heart, she will definitely seek a good teacher and do things, and choose a good friend and a friend."

The Book of Northern Qi and the Biography of Yao Xiong": "Although he is a military general, he is generous in nature and has good faith in governing the people. "Yuan Baipu's "East Wall Story" first fold:

Xiuying

Chemical change is the process by which one or more substances produce other substances.

It can be described by a chemical equation.

Chemical properties are the properties of a substance itself, such as oxygen can be combustible and combustible, that is, the chemical properties of oxygen.

Chemical change is a process, and chemical properties are a characteristic.

Oxygen reacts with hydrogen to form water.

o2+2h2=2h2o

Condition: ignition) is a chemical change, then oxygen can be the opposite of hydrogen because it has a chemical property of combustion, and it is because of his combustion that he can help hydrogen to burn to produce water, so the chemical properties make chemical changes.

Chemical change reaction chemical properties.

Chemical change is a change in color, mass, volume, state of matter.

The so-called chemical change is the formation of new substances, such as burning firewood, rotting food, and so on.

Chemical properties such as flammability, instability, acidity, alkaline, oxidation, reduction, complexation, and the phenomenon of reacting with certain substances. The chemical properties of a substance can be known by the method of causing a chemical reaction of a substance.

For example, carbon is burned in the air to produce carbon dioxide; Hydrochloric acid reacts with sodium hydroxide to produce sodium chloride and water; Heating.

KCLO3 melts to rekindle the sparkled strips, indicating that KCLO3 can release O2 when heated to higher temperatures.