1 g atom of an -emitting (half life = 10 hr) was placed in sealed containers, . Helium atoms will accumulate in the container after |
|||||||
a) |
4.52 hr |
b) |
10.00 hr |
c) |
9.40 hr |
d) |
20.00 hr |
1 g atom of an -emitting (half life = 10 hr) was placed in sealed containers, . Helium atoms will accumulate in the container after |
|||||||
a) |
4.52 hr |
b) |
10.00 hr |
c) |
9.40 hr |
d) |
20.00 hr |