a chemical reaction takes place when

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  • What is a chemical reaction?

  • Chemical reaction, a process in which one or more substances, the reactants, are converted to one or more different substances, the products.

  • What is the difference between substances and reactions?

  • Substances are either chemical elements or compounds. A chemical reaction rearranges the constituent atoms of the reactants to create different substances as products. Chemical reactions are an integral part of technology, of culture, and indeed of life itself.

  • What happens to bonds during a chemical reaction?

  • A chemical bond is a force which holds the atoms together. Therefore, during a chemical reaction, the bonds between atoms have to break so that the atoms can rearrange to form the products. New bonds form between the atoms in the product.

  • How can you tell if a reaction has taken place?

  • Other chemical changes can be felt, for instance when the reaction causes heat to be released. Some chemical changes can be heard, for instance when an explosion takes place. Learners should mention that the reactants are those substances that are present before a chemical reaction has taken place. They react to form the products.

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