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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



Question ID - 101518 | SaraNextGen Top Answer

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

1 Answer
127 votes
Answer Key / Explanation : (b) -

(b)

Where,

Thus, I and III are true

127 votes


127