Question

Which of the following statements is/are incorrect?

• A. Positron has the same mass as that of an electron
• B. Positron has the same charge as that of a proton
• C. Positron has the same e/m ratio as $\alpha$-particles
• D. Emission of a positron results in an increase in the p/n ratio in the daughter nuclide

Answer 1

Answer: (C), (D)

Emission of a positron results in an increase in the p/n ratio in the daughter nuclide

Positron can be written as ${}_1^{0}e$
a) Positron has the same mass as that of an electron.
b) Positron has the same charge as that of an proton.
c) $\alpha$- particles are ${}_2^{4}He$. The charge by mass ratio (e/m) is different for positrons and $\alpha$- particles.
d) Emission of a positron from a nuclide decreases the p/n ratio in the daughter nuclide.