August 2018 1 63 Report
1- leucipo y democrito descubrieron el neutron (v) o (f)
2-el numero de masa se representa por Z. (v) 0 (f).
3-el nucleo del atomo de hidrogeno tiene 2 protones (v) 0 (f).
indica el numero total de particulas fundamentales que existe en el nucleo del 39K
19.
A.19 B.20 C.39 D.48 E.58.





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