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n element is represented as 16X8. FIND
a) THE NUMBER OF ELECTRONS IN ELEMENT X
B) MASS NUMBER OF AN ELEMENT X

No. of electrons=8 (because no. of protons= no. of electrons)
Mass number= 16 (mass no=sum of protons and neutrons)

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a) No. of Electrons = Atomic number or Proton
    No. of Electrons = 8 u 
b) Mass number = No. of Neutrons + No. of  Protons
                          = 8 + 8
                         = 16 u.
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