Question

1. explore: investigate the different radioactive isotopes you have saved. a. which radioisotope is most stable, and what is its half - life? b. in general, how does the half - life change as you move farther away from the stable isotopes?

Explanation:

Step1: Identify stable radioisotope

Without specific list of radioisotopes, in general, some long - lived radioisotopes like uranium - 238 are relatively stable among radioactive ones. Its half - life is about 4.47 billion years. But more accurate answer depends on the specific set of radioisotopes in question.

Step2: Analyze half - life trend

As you move farther from stable isotopes, in general, the half - life tends to decrease. Less stable isotopes decay more quickly, so they have shorter half - lives.

Answer:

A. Without specific list, e.g., uranium - 238 with half - life of about 4.47 billion years (but depends on provided radioisotopes).
B. The half - life tends to decrease.