November 2018 2 122 Report
Tembaga di alam terdapat sebagai isotop Cu-63 dan Cu-65. Jika massa atom relatif tembaga 63,5, maka kelimpahan masing-masing isotop tersebut adalah.....
a. 20% dan 80%
b. 80% dan 20%
c. 25% dan 75%
d. 75% dan 25%
e. 50% dan 50%
Tolong dijawab ya pleaseee.. pake caranya juga :)
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