Topics with syllabus and resources
- Definition of matter.
- The matter has mass and occupies space - Explanation.
- The composition of matter – the brief introduction
- Concepts :
- Definition of Matter question (21)
- The Matter Has Mass and Occupies Space - Explanation. question (42)
- Concept of Composition of Matter question (55)
- Physical and chemical changes.
- Chemical change - formation of a new product with new properties.
- Differentiating between physical and chemical change.
- Classification as physical & chemical change.
- Types of change involved when there is a change of state of matter.
- Types of change involved when there is a change of energy.
- Concepts :
- Concept of Physical and Chemical Changes question (31)
- Chemical Change - Formation of a New Product with New Properties. question (6)
- Differentiating Between Physical and Chemical Change. question (7)
- Classification as Physical and Chemical Change. question (25)
- Types of Change Involved When There is a Change of State of Matter question (13)
- Types of Change Involved When There is a Change of Energy. question (16)
Identification of elements, and compounds from the representation of their symbols and formulae.
Mixtures and compounds: difference between mixtures and compounds on the basis of the chemical composition of constituents.
Recall that a mixture is formed when two or more substances are mixed in any proportion such that
their particles are in intimate contact with one another without undergoing a chemical change.
Types of mixtures: -
- Homogeneous & Heterogeneous mixtures
- On the basis of State: Solid –solid;Solid-liquid;Liquid-liquid.
- use of separating funnel,
- fractional distillation.
Examine the principle behind each separation technique.
Chromatography as a separation technique; Paper chromatography.
- Concepts :
- Identification of Elements, and Compounds - Representation of Their Symbols and Formulae question (9)
- Concept of Mixtures and Compounds question (8)
- Difference Between Mixtures and Compounds on the Basis of the Chemical Composition of Constituents question (1)
- Recall that a Mixture is Formed When Two Or More Substances Are Mixed in Any Proportion
- Types of Mixtures -homogeneous and Heterogeneous Mixtures question (5)
- Types of Mixtures - on the Basis of State: Solid-Solid;Solid-liquid;Liquid-liquid. question (7)
- Separation Techniques - Evaporation question (3)
- Separation Techniques - Distillation question (3)
- Separation techniques - use of separating funnel
- Separation Techniques - Sublimation question (6)
- Separation Techniques - Fractional Distillation question (3)
- Principle Behind Each Separation Technique. question (1)
- Chromatography as a Separation Technique question (3)
- Concept of Paper Chromatography question (4)
- Concept of Elements, Compounds and Mixtures (Experimental Techniques) question (25)
Atoms, Molecules and Radicals
- An atom is the smallest particle of an element.
- It is not capable of independent existence.
- The properties of an element depend upon the atoms constituting it.
- A molecule is the smallest particle of an element or compound, capable of independent existence. It consists of one or more than one atom of the same or different elements.
- A radical is a single atom of an element or a group of atoms of different elements behaving as single unit and with a charge on group.
- Atomicity (no. of atoms in an entity) of elements and compounds – mono atomic, diatomic, triatomic, polyatomic.
- Associate the first 20 elements in the periodic table with their names and symbols
- Valency is the combining capacity of an element or the number of hydrogen 0atoms with which it combines or replaces.
- Concepts :
- Concept of Atoms, Molecules and Radicals question (17)
- Concept of Independent Existence
- Properties of an Element Depend Upon the Atoms Constituting It question (5)
- Concept of Molecule question (23)
- Concept of Radical question (13)
- Atomicity of Elements and Compounds – Mono Atomic, Diatomic, Triatomic, Polyatomic question (5)
- Elements in the Periodic Table with Their Names and Symbols question (3)
- Concept of Valency question (13)
- Concept of Atomic Structure question (30)
A chemical reaction may take place when two or more reactants come in contact with one another and transfer of energy takes place.
Characteristics of occurrence of a chemical reaction:
Evolution of gas
Heat evolved / released
- Chemical Equations: Writing word equations for chemical reactions and emphasize on the observational skills and the names of products formed
Some examples of word equations for practice.
- Concepts :
- Concept of Chemical Reactions question (17)
- Characteristics of Occurrence of a Chemical Reaction question (16)
- Chemical Equations - Word Equations for Chemical Reactions question (20)
- Chemical Equations - Emphasize on the Observational Skills and the Names of Products Formed question (28)
- Chemical Equations - Some Examples of Word Equations for Practice.
- Concept of Language of Chemistry question (2)
- Metals, non-metals
- Distinguish between metals and non-metals with the general properties (lustre,conduction of electricity, heat, malleability, ductility, sonority, melting point, boiling point, density, strength.)
- Classification of elements as metals & non-metals.
- Corrosion of iron (rusting); ways to prevent rusting (oiling, painting, chrome plating, galvanization, tinning) (avoiding contact with air and water vapour).
- Uses of certain metals (iron, gold, copper, aluminium, zinc, lead, magnesium).
- Metalloids: elements that show the properties of both metals and non-metals – e.g. silicon, germanium,tungsten, antimony); uses.
- Concepts :
- Concept of Metals, Non-metals question (22)
- Properties of Metals, Non-metals question (29)
- Metals and Non-metals with the General Properties (Lustre,Conduction of Electricity, Heat, Malleability, Ductility, Sonority, Melting Point, Boiling Point, Density, Strength.) question (10)
- Classification of Elements as Metals and Non-metals. question (5)
- Corrosion of Iron (Rusting) question (2)
- Ways to Prevent Rusting (Oiling, Painting, Chrome Plating, Galvanization, Tinning) question (2)
- Corrosion of Iron - Avoiding Contact with Air and Water Vapour
- Uses of Certain Metals (Iron, Gold, Copper, Aluminium, Zinc, Lead, Magnesium). question (39)
- Concept of Metalloids - metals and non-metals – e.g. silicon, germanium,tungsten, antimony) question (8)
- Uses of Metalloids question (3)
- Air a mixture of gases.
- Composition of air and uses of its components.
- Oxygen is needed for combustion.
- Mass change during burning (burning of magnesium and candle).
- Word equations for reactions of metals and non-metals (S, C, P, Na, K, Ca, Mg) with O.
- Products formed in acid rain; effects of acid rain.
- Air quality.
- Study the properties of oxygen: (physical properties to include colour, odour).
- Respiration and combustion,
- Combustion and rusting.
- Concepts :
- Concept of Air - Mixture of Gases. question (9)
- Composition of Air and Uses of Its Components. question (48)
- Concept for Oxygen - Combustion. question (1)
- Mass Change During Burning (Burning of Magnesium and Candle).
- Equations for Reactions of Metals and Non-metals (S, C, P, Na, K, Ca, Mg) with O question (63)
- Concept of Products Formed in Acid Rain question (3)
- Effects of Acid Rain.
- Concept of Air Quality question (7)
- Study the Properties of Oxygen question (50)
- Concept of Respiration and Combustion and Rusting question (14)
- Concept of Air and Atmosphere question (10)
Books For All Subjects
- Selina Concise Chemistry - Middle School for Class 7 (2018-19 Session)