In this video, we will focus on Group 0 elements, which we call the noble…
Tag: Secondary Chemistry
In this video, we will focus on Group VII elements, which we call the halogens.…
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…
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…