Chemistry

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CHEMISTRY SS 3 SCHEME OF WORK

CHEMISTRY SCHEME OF WORK FOR SS 3 CHEMISTRY SS 3- FIRST TERM 1. Petroleum or Crude Oil 2. Metals and their Compounds 3. Iron 4. Quantitative and Qualitative Analysis 5. Ethical, Legal and Social Issues   CHEMISTRY SS 3- SECOND TERM 1. Fats and Oil 2. Soap and Detergents 3. Giant Molecules (Sugars, Starch) 4. […]

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CHEMISTRY SSS 2 SCHEME OF WORK

CHEMISTRY SS 2- FIRST TERM 1. Periodic Table 2. Chemical Reactions 3. Mass, Volume Relationships 4. Acid-Base Reactions 5. Water. CHEMISTRY SS 2- SECOND TERM 1. Air 2. Hydrogen 3. Oxygen 4. Halogens 5. Nitrogen 6. Sulphur CHEMISTRY SS 2- THIRD TERM 1. Oxidation-Reduction (Redox) Reactions 2. Ionic Theory 3. Electrolysis 4. Hydrocarbons 5. Alkanols

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SCHEME OF WORK FOR CHEMISTRY SS 1

CHEMISTRY SS 1- FIRST TERM 1. Introduction to Chemistry 2. Particulate Nature of Matter 3. Symbols, Formulae and Equations 4. Chemical Combination 5. Gas Laws CHEMISTRY SS 1- SECOND TERM 1. Gas Laws (Cont’d) 2. Standard Separation Techniques for Mixtures 3. Acids, Bases and Salts 4. Water. CHEMISTRY SS 1- THIRD TERM 1. Carbon and

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Chemistry

OXYGEN (O2) PROPERTIES AND USES

OXYGEN (O2) PROPERTIES AND USES   Oxygen (O2) is an active, life-sustaining component of the atmosphere; making up 20% by volume of the air we breathe. It is colorless, odorless and tasteless. Oxygen is the most widely occurring element on earth. Because it forms compounds with virtually all chemical elements except the noble gases, most oxygen

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Chemistry

RUSTING OF IRON

Corrosion The eating up of metals by the action of air and moisture on their surface is called corrosion. The corrosion of iron is called rusting. While other metals are said to ‘corrode’, iron metal is said to ‘rust’. Rusting of Iron When an iron object is left in damp air (or water) for a

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Chemistry

WATER AND HYDROGEN

WATER AND HYDROGEN Hydrogen is the simplest element. It is the first element in the periodic table, and it is placed in Group I of the periodic table.   Hydrogen Occurrence Hydrogen is the lightest element and the most abundant element in the universe. Hydrogen occurs naturally as a mixture of the three isotopes: Protium,

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Chemistry

INDICATORS

INDICATORS Red cabbage juice solution works well instead of universal indicator solution.   Making Cabbage Indicator Acid base indicators are chemicals that change colour in the presence of different pH levels. These are usually larger organic molecules. Some, like that in purple cabbage, are natural. You will be making an acid base indicator from purple

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Chemistry

COMPOUNDS AND FORMULA

COMPOUNDS AND FORMULA  A compound is a pure substance formed by chemically combining at least two different elements. Compounds are two or more different elements combined. Their atoms have been joined or bonded together.   Compounds can be represented by a FORMULA. There must be at least two different types of atom (elements) in a

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Chemistry

SEPARATION OF MIXTURES

SEPARATION OF MIXTURES   Sometimes we need pure substances as opposed to impure ones. You can imagine a mixture of sand and table salt and imagine how much use you would have for it. or imagine the manufacture of drugs and medicines. Purity is highly essential here as it is crucial to our well-being and health.

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Chemistry

CONSTITUENTS OF MATTER

CONSTITUENTS OF MATTER   Atoms, Molecules, Elements and Compounds The Atom An atom is the smallest particle of a substance which can have its own characteristic properties. Atoms are built up of even more fundamental sub-atomic particles. These are electrons, protons and neutrons.   The protons and neutrons are in the nucleus (centre) of the atom and

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Chemistry

CONDUCTORS AND INSULATORS

CONDUCTORS AND INSULATORS  The ability to conduct electricity is the major simple distinction between elements that are metals and non-metals.   Electrical Conductors A conductor is a material that conducts electricity but is not chemically changed in the process. They carry an electric current through freely moving electrons when a potential difference is applied across

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Chemistry

CLASSIFICATION OF SUBSTANCES

Pure Substance Pure means that only one substance is present in the material and can be a pure element or compound. A simple physical test for purity, and properties that can help identify a substance, is to measure the boiling point or melting point. Every pure substance melts and boils at a fixed temperature.  

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Chemistry

CONDUCTORS AND NON-CONDUCTORS

CONDUCTORS AND NON-CONDUCTORS  All metals (copper, iron, lead, magnesium etc) and graphite, a non-metal. Most non-metals (sulphur, iodine, charcoal etc.) Most solid compounds (All gases are non-conductors)   Liquids are classified in three groups as regards their conductivity of electricity: (i) Those that pass an electric current and are not decomposed by if (conductors) (ii)

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Chemistry

COMPOUNDS AND THEIR PROPORTIONS

COMPOUNDS AND THEIR PROPORTIONS  All elements are represented by a chemical symbol. It is either a single capital letter, or a capital letter followed by a small letter. Examples: Ca = calcium Cu = copper C = carbon N = nitrogen Combinations of symbols represent compounds. These compounds are called chemical formulas.   Example: H20 2

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Chemistry

MATTER

MATTER  Matter is: Anything that has mass and occupies space (has volume) Composed of particles (molecules, ions, atoms). These are in constant motion attracting one another with inter-particle forces (or cohesive) Is a solid, liquid or gas depending on interparticle forces of attraction and spaces between particles.   Matter has many properties. It can have

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Chemistry

NAMES OF LABORATORY APPARATUS

Which apparatus? You wouldn’t dream of trying a chicken using a spoon, or of drying your hair in over a stove! In everyday life, we need to use the right tools for the job we are doing. The same is true in the science lab. There are lots of types of different chemical apparatus, all

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Chemistry

SCIENTIFIC METHOD

SCIENTIFIC METHOD  The scientific method is a set of ideas or a procedure that scientists use to investigate things they want to understand. By using the method, you can be sure you’re carrying out your project correctly. The scientific method allows you to investigate an experiment in a step-by-step method.   Problem: What are you going

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