Which of the following elements belongs to -series? |
|||||||
a) |
Pb-207 |
b) |
Bi-209 |
c) |
Pb-208 |
d) |
Pb-206 |
Which of the following elements belongs to -series? |
|||||||
a) |
Pb-207 |
b) |
Bi-209 |
c) |
Pb-208 |
d) |
Pb-206 |