Author: Dr. Vikas Jasrotia

Chemistry Balancing Chemical Equations Practice Balanced Equation A balanced equation is one in which the number of atoms on the reactant and product sides is equal.  Or A number of atoms of an element on the reactant side = number of atoms of that element on the product side. The simple form of representation of a chemical reaction in words is known as a word equation. Magnesium    +     Oxygen    ———–> Magnesium Oxide       Representation of a chemical reaction with the help of chemical formula is called a chemical equation.    2Mg + O2→  2MgO             Chemistry Balancing Chemical…

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Chemical Reactions And Equations Notes Physical Change  Change in physical properties.  Melting  Boiling Condensation Note- No change occurs in the identity of the substance Chemical Change Atoms in the reactants are rearranged to form one or more different substances. Old bonds are broken, new bonds are formed. Reactants lose their properties to form products of different properties.  Examples – Cooking of food Rusting of iron Heating of Lead nitrate Souring of milk Ripening of fruit. Rusting of iron is a chemical change because  A new substance iron oxide is formed. The change is permanent; the article has got a rust layer (which may only peal off).  There is an increase in mass when rust forms. An energy change…

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