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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 nucleon number

The mass of an atom is specified by its mass number which is the total number of protons and neutrons present in the nucleus of the atom.

It is denoted by A.

Therefore,

A = Number of protons + Number of neutrons

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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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