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kow [346]
3 years ago
7

PLEASE HELP!!! 30 points

Chemistry
2 answers:
Leto [7]3 years ago
5 0
D i believe i’m sorry if i am wrong :)
REY [17]3 years ago
5 0

Answer:

False and D

Explanation:

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<em>Dimitri Mendeleev</em> was so succesful that he is recognized as the most important in such work.

Mendeleev by writing the properties of the elements on cards elaborated by him, and "playing" trying to order them, realized that, some properties regularly (periodically) repeated.

The elements were sorted in increasing atomic weight (which is not the actual order in the periodic table), but when an element did not meet the pattern discovered, he moved it to a position were its properties fitted.

The amazing creativity of Mendeleev led him to leave blanks for what he thought were places that should be occupied by elements yet undiscovered. More amazing is that he was able to predict the properties of some of those elements.

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