Mon October 08, 2012 By:

the number of protons and electrons will be always equal or not why?

Expert Reply
Mon October 08, 2012
No they are not, the number of electrons of an atom is the same number it has as its atomic number, and the same number as its number of protons. 
i.e.: Nitrogen
atomic # : 7
electrons: 7 (valence electrons=5)
protons: 7
mass number :14
neutrons: 14-7 = 7
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