Question

Sulphur-35 (34.96903 amu) emits a β-particle but no γ-ray. The product is chlorine-35 (34.96885 amu). The maximum energy emitted by the β-particle is

• A. 16.758 MeV
• B. 1.6758 MeV
• C. 0.16758 MeV
• D. 0.016758 MeV

Answer 1

Answer: (C)

0.16758 MeV

Answer 2

The mass converted into energy

$= 34.96903amu - 34.96885amu = 1.8 \times 10^{- 4}amu$

($1amu = 931.5MeV$)

$\because$ Energy produced$= 1.8 \times 10^{- 4} \times 931.5 = 0.16758MeV$