In this video, we will focus on Group VII elements, which we call the halogens.…
Tag: o-level chemistry
General The elements in Group I of the periodic table are called alkali metals. They…
In this video, we will explore more on the Periodic Table, and find out what…
Basics Energy cannot be created or destroyed. However, it can be changed from one form…
Syllabus Objectives At O levels, students must be able to perform calculations involving the number…
Question Which substance contains the greatest number of atoms in 1 g?iodine (I2); iron (Fe)…
At O levels, students must be able to describe, using dot-and-cross diagrams, the formation of…
Question Sodium hydroxide reacts with sulfuric acid. The equation for the reaction is shown.2NaOH +…
When heated, two moles of X give one mole of oxygen and two moles of…
The formula of an oxide of element Y is Y2O3. 8.0 g of Y2O3 contains…
O Level Secondary Chemistry Tuition 