Ans 3: It is formed by the physical combination of two or more substances. Example- Air is a mixture containing various gases and dust particles. The components of air are just mixed with each other, not combining

Elements are pure substances that are composed of only one type of atom. Compound are substances which are formed by two or more different types of elements that are in fixed proportions. There are nearly 118 elements of which nearly 94 occur naturally on Earth.

Ans 2 :

For example, water is a compound. Water has the chemical name H2O because it contains two hydrogen atoms and one oxygen atom chemically bonded together. H2O is a molecule, and because it contains two different types of atoms, water is also a compound.

Ans 3:

It is formed by the physical combination of two or more substances.

Example- Air is a mixture containing various gases and dust particles. Air components are mixed with each other, not combining chemically.

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An element is a pure substance made up of only one type of atom, characterized by its unique chemical properties and atomic number. In contrast, a compound is a substance composed of two or more different elements chemically bonded together in fixed ratios.

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Water (H₂O) is an example of a compound. It is classified as a compound because it consists of two different elements, hydrogen and oxygen, chemically bonded together in a fixed ratio. In water, two hydrogen atoms combine with one oxygen atom to form a stable compound with distinct chemical and physical properties that differ from those of its constituent elements.

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A mixture is a combination of two or more substances in which each substance retains its own chemical properties. Unlike compounds, the substances in a mixture are not chemically bonded, and their proportions can vary. Mixtures can be homogeneous (uniform composition) or heterogeneous (non-uniform composition).

Example: Trail mix is a heterogeneous mixture consisting of various components like nuts, dried fruits, and chocolates. Each component retains its individual properties, and you can easily see and separate them in the mixture.

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E.g. Air

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Answer 2:An example of a compound can be sodium chloride (NaCl) and it is classified as a compound because Common salt is made up of Sodium and chlorine atom.

Answer 3:The characteristics of a mixture are:

• Mixtures have no fixed composition.

• To form mixture energy is neither produced nor evolved.

• The mixture has no fixed melting points and boiling points.

• Mixture retains the properties of its components.

• Components of mixtures can be separated by simple physical methods

  Examples of mixtures can be:

• Seawater

• Gunpowder

• Air

Elements are pure substances which are composed only of one type of atom. While Compound are substances which are formed by two or more different types of elements that are united chemically in fixed proportions

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Ans.2 Water is compound as it contains different atoms which are Hydrogen and Oxygen So it is Ho2

Ans.3: it is formed by the physical combination of two or more substances.

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Element:It is a substance that cannot be broken down into simpler substance by physical chand or chemical reaction.

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Ans 2:

• Sulphur dioxide/oxide/trioxide:

Sulphur oxide is classified as a compound because its formula is SO², it consists of two or more elements of the same kind. Similarly, sulphur oxide 's formula is SO³, and sulphur trioxid's formula is SO. Sulphur oxide's formula is SO because it contains one element of sulphur and one element of oxygen, and sulphur trioxide's formula is SO³ because is contains one element of sulphur and three elements of oxygen. However, sulphur dioxide is classified as a compound because it consists of elements of different kinds.

Ans 3:

Mixture:

• A mixture is a material made up of two or more, different chemical substances which are not chemically bonded.

• A mixture has no fixed composition.

• To form mixture energy is neither produced or evolved.

• The mixture has no fixed melting points and boiling points.

• Mixture retains the properties of its components.

Components of mixtures can be separated by simple physical methods e.g filtration, crystallisation at.

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Ans 1 : An element is a substance made of same type of atoms, whereas a compound is made of different elements in definite proportions.

Q2. Provide an example of a compound and explain why it is classified as a compound.

Ans 2 : Compounds are substances that are made of two or more different atoms present in a fixed ratio. Eg., water is a compound. It is made up of two elements hydrogen and oxygen.

3. Describe the characteristics of a mixture and provide an example.

Ans 3 : It is formed by the physical combination of two or more substances.The various examples of mixtures are crude oil,Sugar and Salt

Qualities:

1. The mixture has no fixed composition. 

2. To form mixture energy is neither produced nor evolved. 

3. The mixture has no fixed melting points and boiling points. 

4. Mixture retains the properties of its components. 

5. Components of mixtures can be separated by simple physical methods.

Ans 1 An element is a pure chemical substance made of same type of atom. Compound is a chemical of two or more elements of different kinds.

Ans 2 A compound is where atoms of different types are joined or bonded together in molecules. For example, water is a compound. Water has the chemical name H2O, because it contains two hydrogen atoms and one oxygen atom chemically bonded together.

Ans 3 :Mixture is formed by the physical combination of two or more substances. Example- Air is a mixture containing various gases and dust particles. The components of air are just mixed with each other, not combining chemically.

Water is an example of compound because it's made of different types of atoms hydrogen and oxygen

Ans3

When elements exchange electrons mixture takes place

A compound is made up of two are more atoms.

Ans 2;

Water is an example of compouns it has two are more elements in it.

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