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Rev. Notes > IGCSE > The Nuclear Atom
 
 
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The structure of an atom Rutherford's atomic model The nucleus
The proton number The nucleon number
 

The proton number

Atomic number or charge number of an element is defined as the numbers of electrons revolving round the nucleus in a neutral atom, which is the same as the number of protons present in the nucleus of neutral atom.

Thus,

Z = Number of protons in the nucleus

OR

Z = Number of electrons in a neutral atom

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View Comments on this Chapter - Total Comments (1)
 
Diaf Said :
Very good notes
------------------------------------------------------------------------------------- Admin Replied:

Thanks 

 
  10/01/12 11:50 AM
 

 

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