An iron nail is placed in a solution of blue copper(II) sulfate. Over time, a brown solid appears and the solution becomes colourless. This is because copper and a solution of iron(II) sulfate forms.

Symbol equations are a quick way of representing chemical reactions. They show us what atoms are involved and how they are bonded together. Symbol equations always take the form, reactants → ...

The atoms in the reactants are: 1 calcium atom, 2 chlorine atoms, 2 sodium atoms, 2 hydrogen atoms, 2 carbon atoms, and 6 oxygen atoms The atoms in the products are: 1 calcium atom, 2 chlorine atoms, ...

With time running out, focusing on the latest chapter-wise weightage and key topics becomes more important than ever.

To maximise performance, students should follow the POMODORO Method (25 minutes study, 5 minutes break) and strategically plan their time. “ A well-structured timetable ensures comprehensive revision ...