Chemical Reactions: A chemical reaction is a process where the substances 8unbdergo a change in their chemical composition. The substances that enter the reaction are called reactants that are then ...

The processes like crystallisation, boiling, vaporisation, burning of colour, melting point, hardness etc, are called physical changes. These are reversible in nature. The processes like ...

The Schrödinger equation rewrote the rules of matter and forever changed the field of chemistry. Donald Truhlar, a chemist at the University of Minnesota, calls it the “greatest advance of the 20th ...

1 Write a word equation for the reaction. 2 Write a simple equation by writing the name of each substance with its symbol or formula. 3 Check whether the equation is balanced by counting the atoms of ...

It's important to remember which elements exist as molecules, and which do not. Take care to use the correct form in chemical equations involving these elements.

Note: This video is designed to help the teacher better understand the lesson and is NOT intended to be shown to students. It includes observations and conclusions that students are meant to make on ...