1. The element rhenium (Re) exists as two stable isotopes and 18 unstable isotopes. Rhenium-185 has in its nucleus.
(A)75 protons, 75 neutrons.
(B)75 protons, 130 neutrons.
(C)130 protons, 75 neutrons.
(D)75 protons, 110 neutrons.
(E)not enough information is given.
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統計: 尚無統計資料
統計: 尚無統計資料