Who developed the long form of periodic table
1) Lothar Meyer 2) Niels Bohr
3) Mendeleef
4) Moseley
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Mosley
Explanation:
Mosley's developed the long form of periodic table.
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Answer:
In 1869 Russian chemist Dimitri Mendeleev started the development of the periodic table, arranging chemical elements by atomic mass. He predicted the discovery of other elements, and left spaces open in his periodic table for them.
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