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what is different between solids and liquids ?
Solids,liquids and gases are made of atoms  ions and / or molecules .

Solids       : Solids have a definite mass, volume and shape.In solids ,particles are closely   
                   packed and cannot move past one another .            
                  Example :   ice.book,chair etc .
                      
Liquids      :   Liquids have a definite  mass and volume but have no definite shape .In liquids ,
                      particles are not closely packed as solids and can move past one another .
                     Example : water ,alcohol ,kerosene oil etc .

Gases        :    Gases have  definite mass but no definite volume and shape .In gases, particles
                        are loosely packed and can easily move past one another than liquids .
                       Example : vapour ,hydrogen ,oxygen ,nitrogen etc .
           


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