The unstable nucleus decays with - particle emission, having a half-life of 10 h. From this it follows that the I. mass number of the product is 212 II. atomic number of the product is 81 III. fraction of the original isotope remaining after 20 h is 1/4 IV. Nucleus formed is stable Select the correct alternate |
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a) |
I, II and III |
b) |
I and III |
c) |
II and IV |
d) |
IV |
The unstable nucleus decays with - particle emission, having a half-life of 10 h. From this it follows that the I. mass number of the product is 212 II. atomic number of the product is 81 III. fraction of the original isotope remaining after 20 h is 1/4 IV. Nucleus formed is stable Select the correct alternate |
|||||||
a) |
I, II and III |
b) |
I and III |
c) |
II and IV |
d) |
IV |