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P=Número atómico
A=p+n = a-p=n
a²-p²=2580
(a+p)(a-p)=2580
(p+n+p)(n)=2580
(2p+30)(30)=2580
2p+30=86
2p=56
p=28
si posee 30 e significa que ha ganado 2 osea que la carga eléctrica es -2