Question 1:

Which of the following particles has the same charge as an electron but with a much greater mass?

Explanation: The correct answer is A) Proton. A proton has the same positive charge as an electron but with a much greater mass.

Question 2:

Radioactive decay is a spontaneous process where an unstable nucleus:

Explanation: The correct answer is A) Emits particles and/or radiation. During radioactive decay, an unstable nucleus spontaneously emits particles and/or radiation in order to become more stable.

Question 3:

Which of the following radioactive decay processes involves the emission of an electron from the nucleus?

Explanation: The correct answer is B) Beta decay. In beta decay, an unstable nucleus emits a beta particle, which is an electron (or a positron in the case of positron emission).

Question 4:

Which of the following is not a type of radioactive decay?

Explanation: The correct answer is D) Nuclear fission. Nuclear fission is a process in which a heavy nucleus splits into two or more lighter nuclei, but it is not a type of radioactive decay.

Question 5:

Radioactive decay is a random process that cannot be predicted for individual nuclei. However, the decay of a large number of nuclei follows a predictable pattern. Which of the following is used to describe this pattern?

Explanation: The correct answer is B) Decay constant. The decay constant is a characteristic of a radioactive substance that determines the probability of decay per unit time. It describes the predictable pattern followed by a large number of nuclei in radioactive decay.