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
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
Question ID - 102359 | SaraNextGen Top Answer
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
|
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 |
|
(b,d) 2 hours = 4 half lives, therefore, amount left = 6.25% of original. Loss of one |
-particles does not change the atomic number