Question

Объясните чем отличаются элементы, соединения и смеси​

Answer 1

Смесь - это  комбинацию веществ , которые между собой  никак не связаны химически

Соединения - это вещество состоящие из двух или более связанных между собой атомов

Answer 2

Elements, Compounds, and Mixtures

Elements, compounds, and mixtures are all types of substances, but they differ in their composition and properties. Let's explore each of them in detail:

Elements: - Elements are pure substances that cannot be broken down into simpler substances by chemical means. - They are made up of only one type of atom. - There are 118 known elements, each with its unique set of properties. - Examples of elements include hydrogen (H), oxygen (O), carbon (C), and gold (Au). - Elements are represented by symbols, usually derived from their English or Latin names.

Compounds: - Compounds are substances composed of two or more different elements chemically combined in fixed proportions. - They can be broken down into their constituent elements through chemical reactions. - Compounds have properties that are different from the elements they are made of. - Examples of compounds include water (H2O), carbon dioxide (CO2), and sodium chloride (NaCl).

Mixtures: - Mixtures are combinations of two or more substances that are physically mixed together but not chemically combined. - The components of a mixture can be separated by physical means, such as filtration, distillation, or evaporation. - Mixtures can have variable compositions and properties. - There are two types of mixtures: homogeneous and heterogeneous mixtures. - Homogeneous mixtures have a uniform composition throughout, such as saltwater or air. - Heterogeneous mixtures have visibly different phases or components, such as a salad or a mixture of oil and water.

In summary, elements are pure substances made up of only one type of atom, compounds are substances composed of different elements chemically combined, and mixtures are combinations of substances that are physically mixed together. Elements cannot be broken down further, compounds can be broken down into their constituent elements, and mixtures can be separated by physical means.