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proton : 16
elektron : 16
neutron : 16
A = jmlh proton = 16
Z = jmlh proton + jmlh neutron = 16 + 16 = 32
4)
a. Nitrogen : A = 7 Z = 14
proton : 7
elektron : 7
neutron : 7
b. ion Na^+ : A = 11 Z = 23
proton : 11
elektron : 10
neutron : 12
c. ion S^2- : A = 16 Z = 32
proton : 16
elektron : 18
neutron : 16
d. ion Ca^2+ : A = 20 Z = 40
proton : 20
elektron : 18
neutron : 20
SEMOGA MEMBANTU ^_^