Descubra o numero de protons, nêutrons e elétrons dos seguintes atomos:

- 238 U 92:
- 234 Th 90:
- 214 Bi 83:
- 212 Pb 82:
- 140 Ba 56:
- 94 Kr 36:
- 238 Np 93:
- 74 Se 34:
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