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Get CBSE Notes for Class 10 Science Chapter 1. Chemical Reactions and Equations: Writing A chemical equation prepared by experts as per the latest NCERT syllabus and CBSE exam pattern. These concise and easy-to-understand notes cover important definitions, formulas, diagrams, and key concepts from the chapter to help students in quick revision and effective exam preparation. Whether you are studying for school tests, board exams, or competitive exams, these notes provide a reliable study resource. Designed in simple language with point-wise explanations, they save time and enhance learning efficiency. Download free PDF notes, explore solved examples, and strengthen your understanding of [Topic Name] for scoring high marks. Perfect for Class 10 students who want clear, structured, and exam-oriented notes for CBSE Science.
when a magnesium ribbon is burnt in oxygen, it gets converted to magnesium oxide. This is the statement form of a chemical reaction but it can be write as a following manners
Magnesium + Oxygen → magnesium oxide
(Reactants) (Product)
To write the equation in such manner is called as word equation.
Another method to write chemical reaction;
Mg + O2 → MgO
This is symbolic form to write chemical equations.
Here we have known the types of chemical equations.
Theare are two types of chemical equations:
1. Words Equation
2. Symbolic Equation
The chemical equation which is written by using elements name is called word equation
Example of words equation:
Sodium + chlorine → Sodium chloride
The chemical equation which is written by using elemets' symbol is called symbolic equation.
Example of symbolic equation:
Na + Cl → NaCl
There are two part of a chemical reaction
The substances that undergo chemical change in the reaction are the reactants. Example from above equation. Mg and O are reactants.
The new substance, formed during the reaction, is the product. Ex. MgO is product, which newer substance produced in reaction.
A chemical equation represents a chemical reaction. So reactants are on the left hand side (LHS) of arrow and there is written (+) Sign between them. Similarly, Products are on the Right hand side (RHS) of arrow with a plus (+) sign between them.
Consider this;
Mg + O2 → MgO
Observe this equation, count and compare the number of atoms of each element on the LHS and RHS of the arrow. There is no equal numbers of atoms of each element on both sides. There is a little unbalance in number of atoms of Oxygen. There are 2 on left and 1 on the right of arrow. Unbalance chemical equation is called skeletal equation. hi
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