Which of the following statements about radioactivity are true?
i. alpha particle is positively charged
ii. Beta particle is negatively charged
iii. Gamma ray is neutral
iv. Beta particle has the same mass as helium atom
v. Gamma ray is charged
i, ii, iii and iv only
iv and v only
i, ii and iii only
i, ii and v only
all
Correct answer is C
No explanation has been provided for this answer.