November 2018 1 765 Report
Suatu atom unsur dengan nomor massa 201 dan nomor atom 81 mempunyai....
Select one:
a. 201 proton dan 81 neutron
b. 120 elektron dan 80 proton.
c. 81 proton dan 120 neutron
d. 282 proton dan 201 neutron
e. 81 neutron dan 201 elektron
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