tiffcarina69
29.10.2020 •
Chemistry
HELP ASAP
What did Dmitri Mendeleev contribute to science?
A. He discovered many unknown elements.
O B. He arranged the first periodic table.
O C. He developed the first atomic theory.
D. He developed the first model of the atom.
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Ответ:
It B
Explanation:
Ответ:
He discovered the first periodic table
Ответ:
boston
Explanation:
because