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WEEK 2 NOTE.

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 FAMILIES OF ELEMENTS Elements in the same group may be said to belong to a family since they show similar properties because their atoms have the same number of valence electrons. At the same time, certain properties of the element in the same group show a gradual change with increase in atomic number. Such gradual change of property within a group is known as GROUP TREND. GROUP I The group I elements include: Lithium (Li), Sodium(Na), Potassium(K), Rubidium(Rb), Caesium (Cs), and Francium (Fr). They are univalent elements. They properties are as follows: They are good reducing agent since they can readily donate one electron to form cation. They are metals, thus they are good conductors of electricity and heat. They react vigorously with cold water to liberate hydrogen gas and form alkali, hence, they are known as ALKALI METALS. Example2Na(s) + 2H2O(l)→ 2NaOH(aq) + H2(g) The oxides of group I elements dissolve in water to give a very strong alkalis. Example K2O(s) + H2O(l)→ 2KOH(...
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First Term Scheme

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      CHEMISTRY        CLASS:  SSS2 SCHEME OF WORK WEEK    TOPIC The Periodic Table Historical Development of the Periodic Table/Periodic Law Features of the Periodic Table. Periodic Classification into Blocks and Families. Families of Elements. The Periodic Trend The Periodic Properties of Elements: Atomic size, Ionic size,Ionization Energy, Electron Affinity, Electronegativity down the group and across the period. Diagonal Relationship in the Properties of Elements in the Periodic Table.    Types of Reaction/Redox Reactions Definition of Oxidation and Reduction. Relationship between Oxidation Number and IUPAC Naming. Oxidizing and Reducing Agents Identification of Oxidizing and Reducing Agents Balancing of Redox Equations in Acidic and Alkaline Medium. Ionic Theory: Distinguish between: Electrovalent and Covalent Compounds. Electrolytes and Non-electrolytes. Weak and Strong Electrolytes.  Conductors and Non –condu...
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Week 1, 2nd Term

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 SECOND TERM E-LEARNING NOTE SUBJECT: CHEMISTRY      SECOND TERM E-LEARNING NOTE SUBJECT: CHEMISTRY      CLASS: SS 1 SCHEME OF WORK WEEK TOPIC RESUMPTION TEST /  MOLE CONCEPT 1 : Relative Molecular mass, Percentage of element in a compound. 2 MOLE CONCEPT 2 : Relative molecular mass, molar volume of a gas, No of particles, Empirical and molecular formular. 3. Writing and balancing Chemical Equation.       4.                CHEMICAL LAWS and their Verification: calculation based on chemical laws. 5. CHEMICAL COMBINATIONS / BONDING : Electrovalent Bond: Properties of Electrovalent Compounds, Covalent Bond: Properties of Covalent Compounds. Other Types of Bonding 6. . THE  KINETIC THEORY OF MATTER : Meaning, state of matter, use of kinetic theory to explain Bownian movement, diffusion, osmosis. 7.                OPEN DAY/ ...
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PARTICULATE NATURE OF MATTER - 1 (

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  ATOMIC MODELS: The following scientists worked on Atomic Model. 1. J J THOMPSON: proposed a model of Atom consisting of positive and negative charge, present in equal amount so that an atom will be neutrally charged. He proposed that atom was a sphere but the negative and positive charge were embedded in it.  (   DIAGRAM  LEAVE ABOUT 5 LINES) 2. ERNEST RUTHERFORD: Rutherford reversed the Thompson’s model which he showed with his experiment that atom has a small strong nucleus of positively charged. He stated that atom is composed of empty space mostly with electrons orbiting in a set, predictable paths around fixed positively charged nucleus. ( DIAGRAM, LEAVE ABOUT 5 LINES)   3. NEIL BOHR: His model was based on quantum principle. An atom has a positively charged nucleus, and electron travels in around the nucleus in a specified orbit (DIAGRAM, LEAVE ABOUT 5 LINES) DALTON’S ATOMIC THEORY John Dalton, British Physicist and Chemist propose...
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2ND TERM BREAK ANIMATION

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CHEMICAL INDUSTRIES

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  CHEMICAL INDUSTRY: Chemical industry is defined as one that uses chemistry to make chemicals from other chemical substances (raw materials) The important raw materials used in chemical industry include (i) air (ii) CaCO 3 (iii) Sea water and rock salt (iv) Sulphur (v) Metallic mineral ore (vi) Coal           (vii) Natural gas and petroleum. SOURCES OF RAW MATERIALS IN CHEMICAL INDUSTRY AIR: Air is the chief source of O 2 and N 2 . N 2 is important because it is used in the manufacture of NH 3 . NH 3 itself is used in the manufacture of trioxonitrate (v) acid which is used in the making of explosives, plastics and other materials. NH 3 is also used in the manufacture of NH 4 + salts like HN 4 O 3 , (NH 4 ) 2 SO 4 which are used in manufacturing fertilizers.   CALCIUM TRIOXOCARBONATE (iv) (CaC0 3 ): CaCO 3 in the form of lime stone, chalk and marble is the source of lime or calcium oxide which is used for mak...
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JSS 3 ICT NOTE 3rd Term

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    THIRD TERM SCHEME OF WORK Week 1 :    Computer virus (meaning, types of computer virus, example of computer          virus).                                                                    Week 2  :   Source of computer virus. Week 3  :    Virus warning signs. Week 4 :      Virus detection (Anti - virus). Week:      5 - 6 ;     Revision Week:    7-12  revision and examination. WEEK 1. COMPUTER VIRUS A computer virus is a malicious code designed to spread from ...
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