SS2 Chemistry – Chlorine and Other Halogens

HALOGENS The halogens are the group VII elements. The family comprises of fluorine, chlorine, bromine, iodine and astatine. Each member of the family contains 7 electrons at the valence shell.

SS2 Biology – Terrestrial Habitat

CONTENT Terrestrial Habitats Marsh Forest Grassland Arid land   TERRESTRIAL HABITATS Organisms of the land are called terrestrial organisms. They include plants and animals that are found living on the

SS1 Chemistry – Acids, Bases, and Salts

CONTENT Definition. Properties. Preparation and uses. pH. Bases Salts Efflorescence, deliquescence and hygroscopic   ACIDS Definition: An acid is a substance that in aqueous solution produces hydroxonium ion (H3O+) or