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SS1 Biology – Nutrition in Animals

Animal Nutrition (Food Substances) – Classes of food, vitamins, and minerals   Food is a complex, energy-rich organic matter that living organisms feed on to obtain nutrients and substances necessary

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.