07060545017, 07060545027


Classwork Series and Exercises {Chemistry – SS1}: Halogens

Chemistry SS 2 Week 1 Topic: Halogens Introduction The halogens are the collective name given to the elements in group VII of the Periodic Table. There are five halogens; fluorine, chlorine, bromine, iodine and astatine. Astatine is very radioactive and cannot exist for more than a few microseconds before decaying. We will thus be concerned [...]

Why Do We Pay More For Electricity Even Though We Now Use Less Than We Used To?

You may have noticed that your household pays more for electricity than you did few years ago. Though, more households - including yours - may have replaced halogen bulbs with energy-saving bulbs, yet you still have to pay more in electricity bill. What exactly are the reasons? Below is the breakdown of energy use for [...]