A certain nuclide has a half life period of 30 min. If a sample containing 600 atoms is allowed to decay for 90 min, how many atoms will remain? |
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a) |
200 atoms |
b) |
450 atoms |
c) |
75 atoms |
d) |
150 atoms |
A certain nuclide has a half life period of 30 min. If a sample containing 600 atoms is allowed to decay for 90 min, how many atoms will remain? |
|||||||
a) |
200 atoms |
b) |
450 atoms |
c) |
75 atoms |
d) |
150 atoms |
(c)
Number of half lives = 3
We know that
(Number of atom left after) disintegration)
atoms