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I believe the most amazing part was the way he guessed the elements.

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By what the elements are composed of.

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How accurately he predicted the elements.

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The most amazing part for me was how many bad things he had to go through like his father dying.

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I think the periodic table is organised by composition and how much they way.

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I wonder how much time it took him to create the periodic element?

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Even though he never even examined the element he was right and the French guy that had examined it was wrong.

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The periodic difference between elements.

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When he became obsessed did any other scientists help him and become obsessed too?

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The most amazing part of Mendeleev's story was how he noticed about the elements and how many things he has to pass after his father died.

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I think they are organized by the composition of what the elements are made of.

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I wonder how much time he took creating the periodic table of elements.

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The fact that his mother made so much sacrifices for him.

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By their composition.

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Why is the periodic table so big.

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All the things her mother did for

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By their atomic weights

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That he didn't win a nobel prize but, got an element named after h

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The time he spent on the table

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That his mom and dad died when he was too young, and that the mom of Mendeleev left his siblings alone anywhere so they could survive by themselves.

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By their atomic weights, composition and their similar properties.

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The most amusing thing to me is that he was very poor but his mother still managed to give him a good education.

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By its reactivity

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By their components and weight/mass.

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How much time it took to make the table.

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Nothing.

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I wonder how much time it took him to make it and realize that there were missing elements

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The most important was that he was very poor and his mom managed him and his brothers.

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Weight and mass.

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The most amazing part of the story is how Mendeelev had to pass through all those things and ended up being a genius.

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How much time did it take for him to do it?

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The most amazing part was how he tried his best to make her mother proud because of all the hard work she made for him to study.

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By there components and mass/weight.

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By the components of each similar elements and the mass from lightest to heaviest.

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How much time did it take him to organize the periodic table?

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How did could he actually predict and come up with the names.

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The most amazing part is that they accepted Mendeleev in the university.

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In their characteristics and their weight.

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I wonder how did he felt when his mother died. I also wonder if it was easy for him to make the periodic table.

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His acceptance in college.

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Data and Similarities

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I wonder which elements are missing.

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The most amazing thing was that he passed through hard things and turned out to be an amazing genius and scientist!

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I think that by their weight /mass and by their characteristics similarities/what they have in common.

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How he could be right by the things he predicted and how he knew/predicted which were the missing elements (some).

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What amazed me is that someone with such difficulties in life, would give up, or even do something worse, but Mendeleev didn't care about those issues, and went on to be one of the most genius humans known to mankind

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By what they are made of, and by their weight.

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If he actually predicted every single element exactly how they were.

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What amazed me the most was how dedicaded he was to do something incredible to honor his mom and dad which made him discover that he was a genius.

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They are organized by components and riactivness.

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Two things I wonder are:
1. How he got the theory of creating more elements and how he was so accurate.
2. How much time it took him to finish the periodic table.