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

explanation:

the intellectual community is a place like a university where people with high marks, or original thought or an outstanding interest in something gather. they take classes together. they discuss things. they argue sometimes, and not always in a friendly way. but if they argue, it is because they are passionate about something, and there is nothing the matter with that.

lately i've been hearing rumors that it is not the way it was when i went to school. the one thing all schools used to have was free speech. the 1st amendment rights were sacred. now i'm hearing they are not. students can be reported and disciplined for giving an off the wall opinion.

that is shameful.

intellectual ideas are meant to be discussed. they are meant to be chewed up and worked on. that is the primary responsibility of every intellectual community. if that is not the way it is, then that is not a school to go to.

social media, in my opinion, and this is just an opinion. i wouldn't take it too seriously, complicates everything to do with human communication. you can want to share things and others feel they have the right to be very critical or sarcastic or mean about what you share. lack of respect is an immeasurable intolerable condition and social media abounds with that sort of thing.

one of the things i really like about is how careful people are because they must have some idea that the mods are exactly what the word says they are. they police this board very well, and what is so remarkable about them is that they are no older than the average grade 12 student.

my hat goes off to them (which means i respect them quite a bit).

the answer is choice a mark me as brainliest plzzz

give correct answers

1) if the central idea of "nameless, tn" is "even the tiniest of towns, and the people living there, have value and meaning in this world," which of the following pieces of evidence from the story does not support this central idea?  

a. miss ginny keeps a deathbook of all those in nameless who have passed.

b. there was a doctor who cared about the people and the old way of doing things.

c. miss ginny doesn't like the look of the narrator's van.

d. the general store provided a variety of goods for all the people in nameless.

2)authors rarely state the central idea in narrative nonfiction. how can a reader find the central idea when the author doesn’t state it explicitly?

a. to find the central idea, you look for outside resources about the text and try to determine it through their analysis.

b. to find the central idea, you look at the details in the text: what characters say and do, the events that occur, important challenges or conflicts represented, and the setting. then you think about how these details work together to build and convey a big idea or message

c. to find the central idea, you look at the first paragraph of the story and make a guess.

d. none of these.