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

When an equation of a chemical reaction is written, it is “balanced” to show this. A balanced chemical equation shows that no atoms are destroyed and no new atoms are created in the chemical reaction.

Chemical Reactions: Get here detailed information on chemical reactions and their equations, types and examples . Download UGC NET Answer Key 2025. School + ... Chemical Equations.

Explain to students that the chemical formula for hydrogen peroxide is H 2 O 2. Point out that hydrogen peroxide is not very stable and breaks down into water and oxygen. This kind of change is a ...

Chemical reactions can be summarised using symbol equations. Learn more in this KS3 Chemistry guide from Bitesize.

Here the authors propose a robust method to retrieve the fingerprint of intrinsic chemical information by using the photoluminescence of the metallic ... Equation (7) is obtained by relating ...