If CH = X, then BJ = ? |
|||||||
(a) |
T |
(b) |
R |
(c) |
V |
(d) |
L |
If CH = X, then BJ = ? |
|||||||
(a) |
T |
(b) |
R |
(c) |
V |
(d) |
L |
A radioactive element A decays by the sequence and with half-lives given below: Which of the following statements about this system are correct? |
|
a) |
The mass number of B is greater than A |
b) |
After two hours, less than 10% of the initial A is left |
c) |
Maximum amount of B present at any time is less than 50% of the initial amount of A |
d) |
The atomic numbers of A and C are the same |
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