Discussion Forum
Que. | Number of radioactive isotopes is |
a. | 30 |
b. | 40 |
c. | 50 |
d. | 60 |
Correct Answer:40
|
Que. | Number of radioactive isotopes is |
a. | 30 |
b. | 40 |
c. | 50 |
d. | 60 |
Correct Answer:40
|