ATOMIC THEORY AND NATURE OF ATOMS Chemistry studies the composition of matter and the changes it undergoes. Matter has been defined as anything that has weight and can occupy space. All materials are made up of matter. For centuries, philosopher, chemist and physicist tried to answer the question of what matter was made up of using a variety of experiments and observations. 1.1 THE EARLY IDEAS OF THE ATOM In 440BC a Greek philosopher named Democritus came up with a conceived idea that matter...
Structural Adaptations are the way something is built or made. While Behavioural Adaptations are the way something behaves naturally or by instinct.
A biodiversity audit is a way to investigate, count and record what flora, fauna is present in an area. Conducting a biodiversity audit at your school will help you identify if you have a healthy eco system or if you need to add habitat for a category of animal to make it a healthier animal.
There are seven classes of the nutrients the body needs. These are carbohydrates, proteins, fats and oil, vitamins, minerals and water, and fiber. It is important to consume these seven nutrients on a daily basis to build and maintain health.
The elements are found in various state of matter and define the independent state of constituents of atoms, ions and simple substances and compounds. Isotopes with the same atomic number belong to the same elements. When elements are classified into groups according to the similarities of their properties as atoms or compounds the periodic table of the elements emerges.
CHAPTER1 ATOMIC THEORY AND NATURE OF ATOMS Chemistry studies the composition of matter and the changes it undergoes. Matter has been defined as anything that has weight and can occupy space. All materials are made up of matter. For centuries, philosopher, chemist and physicist tried to answer the question of what matter was made up of using a variety of experiments and observations. 1.1 THE EARLY IDEAS OF THE ATOM In 440BC a Greek philosopher named Democritus came up with a conceived idea...
Sources of Organic Compounds • The leading sources are i) Coal is formed from wood millions of years ago through the following coalification stages: wood peat lignite subbituminous coal bituminous coal anthracite coal ii) Petroleum (crude oil) and Natural gas – organic compounds can be obtained from petroleum (crude oil) which contains mainly saturated, unsaturated and aromatic hydrocarbons. Solvent Extraction • Coal is extracted by digestion with solvents such as tetracloromethane,...
However large the group concerned one of its many possible arrangements can still be designated by this simple system. The prefix n is used to designate any alkaline group in which all carbons form a single continuous chain and in which the point of attachment is very end carbon.
The surface area of a three-dimension object is the total area of its surface that is exposed on the outside while its volume is the space inside the shape. For the purpose of comparison of the Volume to Surface area for the three shapes, we can assume the total surface area for each shape to be 38 cm2. This is derived from the assumption of an average size of a cube has a side length of approximately 2.5 centimeters (cm)
PART A: TRIGONOMETRIC FUNCTIONS AND IDENTITIES Lecture 1: Measurement of Angles Lecture 2: Trigonometric Functions Lecture 3: Quadrants Lecture 4: Trigonometric Functions of Compound Angles Lecture 5: Sum and Difference of Two Angles Lecture 6: Trigonometric Ratios of Multiple and Sub-Multiple Angles Lecture 7: Identities of Trigonometric Functions Lecture 8: Graphs of Trigonometric Functions PART B: TRIGONOMETRIC EQUATIONS AND INEQUALITIES Lecture 1: Trigonometric Equations PART C: PROPERTIE...
1. Given that √5 = 2.236, evaluate 3 2√5 (a) 0.7608 (b) 0.6708 (c) 0.8076 (d) 0.7806 2. Simplify 4!4! 2!2!2! (a) 2! (b) 4! (c) 3 x 4! (d) 4 x 4! 3. Find the number of ways of arranging the word MATHEMATICS (a) 4989600 (b) 4898006 (c) 4889006 (d) 4889600 4. A committee consisting of 3 men and 5 women is selected from 5 men and 10 women, find how many ways the committee can be formed (a) 262 (b) 226 (c) 622 (d) 252 5. A school principal and his wife as well as three other teachers are to...
1(a) Differentiate between the following (i) Fractional distillation and simple distillation (ii) Filtration and decantation (iii) Sublimation and evaporation (b) Given a mixture of sodium chloride, ammonium chloride and sand, explain how you will go about separating the mixture to obtain each component in the pure form
1. In IUPAC nomenclature the parent chain is determined by the number of carbon atoms in_______ (a) a straight chain (b) the longest continous carbon atom (c) the side chain (d) the substituents 2. Cis-alkenes are obtained by hydrogenation of alkynes with _____ catalyst (a) hydration (b) Lindlar (c) Tollen's (d) Vicinal. 3. The following are examples of addition reactions of alkenes EXCEPT (a) hydration (b) hydrohalogenation (c) ozonolysis (d) hydrogenation 4. Addition of HBr to propene in th...
Intrduction Atomic Theory of Matter Discovery of the Sub-Atomic Particles The Electron The Proton Rutherford Model of Atom The Neutron Atomic Number/ Mass Number/ Isotopes Emission Spectra The Bohr Atomic Model Atomic Spectrum of Hydrogen Quantum Theory of Atomic Orbitals Shapes of Orbitals Electronic Confiuration of Atom The Periodic Table Description of the Periodic Table What is Ionization Energy Electron Affinity Electronegativity Electrovalent (ionic) Bonding The Chemical Bonds Structure...
INSTRUCTIONS: (a) Attempt all questions (b) Write the correct answers only (c) Constants: 1nm = 10-9m, h=6.625 x 10-34Js and c = 3 x 108m/s, R = 3.289 x 1015Hz (d) H = 1, C= 12, O= 16, Na = 23, N=14, Ca=40, Cl=35.5 1. Write a balanced equation for tetraoxosulphate (vi) acid and sodium hydroxide 2. 25cm3 of hydrochloric acid was titrated against 20cm3 of sodium hydroxide solution that contains 2.30g in 250cm3. Calculate the concentration of the acid in mole/dm3 3. Calculate (i) Concentration o...