Question

1. analyze: if necessary, continue to save points on the graph until the show all button activates. when it does, click show all. zoom out on the graph until you can see all of the elements. the green area identifies all of the known radioactive isotopes. the blue area shows the stable isotopes. this area is known as the band of stability. a. how does the slope of the band of stability change as the number of protons increases? b. if necessary, turn on show neutron:proton ratio. what is the n:p ratio for the heaviest stable isotopes? c. zoom in on the graph and drag the graph until you can see the top end of the band of stability. what is the heaviest stable isotope?

Explanation:

Step1: Recall nuclear - stability concept

As the number of protons increases, more neutrons are needed to maintain stability. The band of stability has a steeper slope.

Step2: Identify heaviest stable isotopes

The heaviest stable isotopes have a neutron - to - proton ratio of about 1.5.

Step3: Locate heaviest stable isotope

The heaviest stable isotope is lead - 208 ($^{208}$Pb).

Answer:

A. The slope of the band of stability becomes steeper as the number of protons increases.
B. Approximately 1.5
C. Lead - 208 ($^{208}$Pb)