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Z= 8 A= 16 Simbolo del elemento: O -- #protones= 8 -- # neutrones=8
Z= 23 -- A= 58,69 -- Simbolo: Ni -- # protones= 28 -- # neutrones= 30
Z= 80 -- A = 199 -- Simbolo= Hg (Mercurio) -- # protones= 80 -- # neutrones= 121
2.
a= 6
b=1
c= 5
d=7
e= 2
f=4
g= 3