While developing his periodic table, Dmitri Mendeleev broke his own rule and placed the element tellurium before iodine in the group. He did this even though tellurium's atomic mass was known to be greater than iodine's. In his notes, Mendeleev stated that he expected tellurium to have a lower atomic mass than iodine. However, all measurements continue to show that tellurium has a greater atomic mass than iodine even though tellurium acts like it has a lower atomic mass. What is the most likely reason that Mendeleev placed tellurium before iodine?

Mendeleev observed that tellurium has chemical properties like other elements in its group, and he did not know that neutrons cause the greater atomic mass.
Iodine isotopes usually have more neutrons than tellurium isotopes, but only the protons affect the properties that Mendeleev could have observed.
Mendeleev observed that tellurium and iodine both had very similar chemical properties, but he did not know that iodine atoms have more electrons.
Iodine atoms always have more protons than tellurium atoms, but Mendeleev only weighed elements without observing any other properties

the answers are:

1. dolores driscoll - b. first person minor

dolores is a minor character who happens to be driving the bus at the time of the accident. she narrates picking up each of the children and her last memory is the children being thrown around the bus.

2. billy ansel - a. first person major

billy loses his twins in the accident. he tells his own story, how he witnessed the accident and how he tried to the rescuers. he is a major character, as he is at the center of the story.

3. mitchell stephens - c. first person observer

mitchell enters the story after the accident. he is a lawyer who learns about the accident based on other characters observations. though he tells the story from a first person perspective, he is just an observer.

as for matcthing the message or lesson posted with the person who said them:

1."obviously, you can't control everything, but you are obliged to take care of the few things you can. i'm an optimist basically who acts like a pessimist. on principle. just in case." - dolores driscoll

2. "i could no longer believe even in life. . for me now the only reality was death." - billy ansel

misty passage from the question