proton 13
elektron = proton
tapi karena y3+ kehilangan 3 elektron maka elektron = 10
neutron = 27-13 = 14
jawabannya D
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proton 13
elektron = proton
tapi karena y3+ kehilangan 3 elektron maka elektron = 10
neutron = 27-13 = 14
jawabannya D