Question
Sat March 12, 2011 By: Gaurav Avhad
 

WHAT IS THE DIFFERENCE BETWEEN ATOMS AND MOLECULES AND COMPOUNDS AND PARTICLES AND SUBSTANCES AND MATERIALS?

Expert Reply
Mon March 14, 2011
Atoms are the smallest particle of an element and is the unit of chemical reactions.it may or may not have independent existence.
Molecule is the smallest particle of a substance (elment or compound ) which can exit independently.
 
A compound may be defined as the substance obtained by the combination of two or more elements in a definite proportion by mass and can be decomposed by  chemical means into its constituent elements.
Matter , substances are same.
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