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SULPHUR AND ITS COMPOUND SULPHUR AND ITS COMPOUND:A.SULPHUR (S) Sulphur is an element in Group VI(Group 16)of the Periodic table . It has atomic number 16 and electronic configuration 16 and valency 2 /divalent and thus forms the ion…

CHLORINE AND ITS COMPOUND A.CHLORINE Chlorine is a non-metallic element in group VII (Group 17) of the periodic table. It has electronic configuration 2:8:7. It gains one valence election to form stable Cl-ion, it belongs to the…

CARBON AND ITS COMPOUND A: CARBON Carbon is an element in Group IV(Group 4)of the Periodic table .It has atomic number 6 and electronic configuration 2:4 and thus has four valence electrons(tetravalent).It does not easily ionize but…

WATER AND HYDROGEN WATER AND HYDROGEN:WATER Pure water is a colourless, odourless, tasteless ,neutral liquid. Pure water does not exist in nature but naturally in varying degree of purity. The main sources of water include rain,…

AIR OXYGEN AND COMBUSTION  A.THE ATMOSPHERE . 1.The atmosphere is made up of air. Air is a mixture of colourless , odourless gases which is felt as wind(air in motion).All living things breath in air for respiration . Plants use air…

INTRODUCTION TO ACIDS, BASES AND INDICATORS 1.In a school laboratory: (i)An acid may be defined as a substance that turn litmus red. (ii)A base  may be defined as a substance that turn litmus blue. Litmus is a lichen found…

CLASSIFICATION OF SUBSTANCES CLASSIFICATION OF SUBSTANCES:Substances are either pure or impure. A pure substance is one which contains only one substance. An impure substance is one which contains two or more substances. A pure…

INTRODUCTION TO CHEMESTRY Introduction to chemistry Chemistry is a branch of Science. Science is basically the study of living and nonliving things. The branch of science that study living things is called Biology. The branch of…

WRITING FOR FORM FOUR WRITING FOR FORM FOUR:PERSONAL WRITING (a) Recipes  A recipe is a set of steps that lead to a delicious food. It is a set of directions that describes how to prepare a culinary dish. With the recipe, one…

GRAMMAR FOR FORM FOUR GRAMMAR FOR FORM FOUR:PARTS OF SPEECH NOUNS FUNCTIONS OF NOUNS IN SENTENCES The noun functions in a sentence are: It can be the subject of a verb. Examples, My niece chairs the meetings. “My…