What about substances?
The concept of "substance" is used in many sciences, for example, in chemistry, physics, biology, astronomy.
In this article, we will talk about what a substance is in chemistry, and consider the classification of substances.
Substance: Definition and Classification
In chemistry, matter is a substance that hasspecific chemical composition. According to the laws of chemistry, each substance can belong to a particular group. Classification begins with the definition - simple or complex this substance. As a rule, a simple substance consists of one atom, while complex substances have two or more atoms.
Simple substances are divided into metals, nonmetals andinert substances, including noble gases. Metals, as a rule, have a solid structure, consist of atoms, have a metallic luster. Non-metals are molecular, they conduct heat and current poorly. This subgroup is usually referred to as water and gases. Inert substances include gases and molecules that contain one atom. Complex "break up" into organic and inorganic, which, in turn, can be alive and lifeless.
Classification of complex inorganic compounds
According to the principle of division of these substances,chemical compounds can be binary and multi-element. Binary include oxides (basic, acidic, amphoteric) and halides (chronides, fluorides, bromides).
Multiple substances have a widerclassification. As a rule, they are divided into hydroxides, salts and complex compounds. Hydroxides are basic, acidic and amphoteric elements. Salts include acidic, medium and basic compounds.
Classification of organic substances
As a rule, such substances includecarbon. The division of substances that belong to the organic group is based on the most important principle: the need to determine the structure of the carbon skeleton and those functional groups that it has.
Taking into account the nature of the carbon skeleton,organic substances are divided into cyclic and acyclic. The first subgroup includes carbocyclic and heterocyclic. Acyclic are divided into limiting and unsaturated.
If we talk about the functional derivatives of hydrocarbons, then they include alcohols, ketones, esters, fats, monosaccharides, nucleic acids and much more.
So you have learned that it refers to substances in chemistry.