Nuclear Chemistry Question 20

Question: Sulphur-35 (34.96903 amu) emits a $ \beta - $ particle but no $ \gamma - $ rays, the product is chlorine-35 (34.96885 amu). The maximum energy emitted by the $ \beta - $ particle is

[DPMT 2004]

Options:

A) 0.016767 MeV

B) 1.6758 MeV

C) 0.16758 MeV

D) 16.758 MeV

Show Answer

Answer:

Correct Answer: A

Solution:

Mass defect = mass of sulphur - mass of chlorine $ =34.96903-34.96885 $

$ =0.00018g $ Binding energy =mass defect $ \times $ 931 $ =0.00018\times 931 $

$ =0.1675MeV $