Transcription of 2 ATOMIC STRUCTURE
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2 ATOMIC STRUCTURE
Notes 45 ATOMIC StructureCHEMISTRYMODULE - 2 ATOMIC STRUCTURE andChemical Bonding2 ATOMIC STRUCTUREC hemistry has been defined as the study of matter in terms of its STRUCTURE ,composition and the properties. As you are aware, matter is made up of atoms,and therefore an understanding of the STRUCTURE of atom is very important. Youhave studied in your earlier classes that the earliest concept of atom ( smallestindivisible part of matter ) was given by ancient Indian and Greek philosophers(600-400 BC). At that time there were no experimental evidence. The origin ofthe concept of atom was based on their thoughts on What would happen if wecontinuously keep dividing matter.
The atomic number (Z) is the number of protons in the nucleus of each atom. of an element. In, a neutral atom the number of protons is equal to the number of electrons, so the atomic number also indicates the number of electrons present in the atom. The chemical identity of an atom can be determined solely from its atomic number.
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