Chemical Reactions

    When people think you weak,become strong  They think to ruin you,forgets they can be ruined They think they can snatch your wealth Forget theirs can be snatched They can’t be God  We can’t be angles  They can be rude  We can’t be humble They can humiliate  We can’t respect They make wicked plans  Show them their Hypocritical faces They can be your boss  You can’t be their slave  

  Atoms and molecules   Matter:Anything that occupies space and have mass is called matter. All matter is made up of small particles called atoms and molecules. Different kinds of atomshave different properties due to which different kinds of matter also show different properties.   Laws of chemical combination: 1.Law of conservation of mass: Matter can neither be created nor be destroyed in a chemical reaction. In a chemical reaction:The substances written on the left hand side are known as reactants whereas the new substances formed and written on the right hand side of the reaction are known as products. A+B  —————>  C+ D Reactants             Products  Hence the Law of conservation of mass can be defined as: In a chemical reaction, the total mass of products is equal to the total mass of reactants. There is no change in mass during a chemical reaction.  CaCO 3  ——————> CaO+...