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# lesson note

## Classwork Series and Exercises {Chemistry- SS3}: Alkanoic Acids

Introduction Alkanoic acids are also known as carboxylic acids. A carboxylic acid can he identified from the carboxyl functional group and the ‘-oic’ name ending. Structural Examples of carboxylic acids Nomenclature (Naming Alkanoic Acids) Alkanoic acids are named as follows: The number of carbon atoms in the longest carbon atom chain is noted The corresponding […]

## Classwork Series and Exercises {Mathematics- JSS3}: Standard Index Form

Standard Index Form Standard index form is also known as standard form. It is very useful when writing very big or very small numbers. In standard form, a number is always written as: a × 10 n a is always between 1 and 10. n tells us how many places to move the decimal point. Example

## Classwork Series and Exercises {Chemistry- SS2}: Faraday’s Laws of Electrolysis

Introduction  In chemistry, quantitative laws used to express magnitudes of electrolytic effects, first described by the English scientist Michael Faraday in 1833. The quantities of substances produced or consumed by the electrolysis process is dependent upon the following: electric current measured in amperes or amps time measured in seconds the number of electrons required to

## Classwork Series and Exercises {Physics- SS3}: Electric Measurement

Resistivity Resistivity: The resistance of a wire or material conductor maintained at a constant temperature is related to its length (l) and its cross-sectional area (A) by the expression R = ρ l/A Where ρ is a constant of proportionality known as the resistivity of the material Then we could deduce ρ = RA/l Thus

## Classwork Series and Exercises {Mathematics- SS1}: Indices

Introduction We define the notation 22 as “two squared” or the square of two” or “two raised to the power of 2” and it means 2 x 2. i.e. 22 = 2 x 2 (i.e. 2 multiplied by itself in 2 places ) also 23 = 2 x 2 x 2 ( i.e. 2 multiplied

## Classwork Series and Exercises {Chemistry- SS1}: Experimental Discoveries of Atomic Particles

Introduction Electrons Electrons were discovered by Sir John Joseph Thomson in 1897 in his cathode ray experiment. He subjected residual gas to a high potential difference at a very low pressure. He observed rays travelling in straight lines from the cathode. He called the rays cathode rays.  After many experiments of cathode-rays, J.J. Thomson demonstrated

## Classwork Series and Exercises {Physics- SS1}: Density and Relative Density

Introduction Equal volumes of different substances have different masses or weights. For example 1 m3 of lead weighs differently from 1 m3 of wood. Also 1 m3 of water has a weight different from that of sulphuric acid or palm oil of the same volume. This is due to differences of in the quality of

## Classwork Series and Exercises {Mathematics- SS1}: Standard Form

Standard Form Here we will learn a form of writing numbers. We use the standard form to express very large and very small numbers e.g. 327,800, 000, or 0.000096. The standard form is written as a x 10n where a is a number between 1 and 10 and n is a +ve or –ve integer.

## Classwork Series and Exercises {Chemistry- SS1}: Radicals

Introduction A radical is a group of atoms which behave as one unit. They do not exist separately outside a compound. Radicals are divided into two parts namely cations and anions. The cations are the positive radicals and they are known as the metallic radicals. The anions are the negative radicals and they are non-metallic

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