Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices: (1) Radioactive nuclides are not known for any of the naturally-occurring elements.
(2) The amount of charge on an alpha particle is twice that on a beta particle.
(3) The largest single contributor to radiation exposure for the "average" American is the nuclide radon-222.

Question

Quizplus · Accepted Answer

(1) is FALSE because there are naturally occurring radioactive nuclides, such as uranium and potassium.
(2) is FALSE because alpha particles have double the charge of beta particles (not the other way around).
(3) is TRUE; radon-222 is a gas that can accumulate in homes and is a leading cause of lung cancer in the US. Therefore, only statement (3) is true while the other two are false, making the answer choice (B) - two of the three statements are true.

Characterize EACH of the Three Given Statements as Being TRUE