SS2 Chemistry – Rates of Chemical Reactions
Explore More
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.