Teaching Objectives

• To make the student know what is matter and that matter is made of particles .These particles are separated by certain distance. The particles attract each other.
• To make the student aware that matter can be classified on the basis of physical states as solids, liquids and gases or on the basis of composition such as elements, compounds and mixtures.
• To make the student aware that solids, liquids and gases have their own characteristic properties.
• To make the student understand that elements are basic substances which can not be broken down into simpler substances.
• To make the student know that elements and compounds are pure substances but compounds are made from elements.
• To make the student understand that mixtures are made of elements and /or compounds
• To make the student know that compounds and mixtures have their own but different characteristic properties. Mixtures can be classified into homogeneous and heterogeneous types.
• To make the student understand that alloys are mixtures of two or more metals or a metal and a non-metal.
• To make the student know that the abbreviated names of elements are called symbols and symbolic representation of a molecule of an element or compound is called a formula

Learning Objectives

1. The student should know what is matter and that matter is made of particles. These particles are separated by certain distance. The particles attract each other.
2. The student should be aware that matter can be classified on the basis of physical states as solids, liquids and gases or on the basis of composition such as elements,compounds and mixtures.
3. The student should know that solids, liquids and gases have their own characteristic and properties.
4. The student should understand that elements are basic substances which can not be broken down into simpler substances.
5. The student should know that elements and compounds are pure substances but compounds are made from elements.
6. The student should understand that mixtures are made of elements and /or compounds
7. The student should know that compounds and mixtures have their own but different characteristic properties. Mixtures can be classified into homogeneous and heterogeneous types.
8. The student should understand that alloys are mixtures of two or more metals or a metal and a nonmetal.
9. The student should know that the abbreviated names of elements are called symbolsand symbolic representation of a molecule of an element or compound is called a formula

Core Tips

1. We are all surrounded by matter. Matter is made of particles which attract each other.
2. Matter can be classified on the basis of physical states - solids, liquids and gases or on the basis of composition, as elements, compounds and mixtures.
3. Solids, liquids and gases have their own characteristic properties in terms of shape and volume, colour, texture, odor and many other physical or chemical properties.
4. Elements, compounds and mixture have their own characteristic properties.
5. Elements are the basic form of matter that can not be broken down into simpler substances. Compounds are prepared by combination of two or more elements in definite proportion. Mixtures are made from elements and / or compounds mixed in any proportion.
6. Mixtures can be classified into (i) homogeneous and (ii) heterogeneous
7. Alloys are the mixtures of two or more metals or a metal and a non-metal combined in some proportion.
8. Symbols are abbreviated names of elements while formulae are the symbolic representation of molecules of elements and compounds.