201003IN 201003IN

Science

Answered

ACTIVITY:
TAST 1; FILL IN THE BLANK
-----------1 THE PERIODIC TABLE COULD BE TRACED BACK IN WHAT YEAR?

Sagot :

EGAMINOROBERT7IN EGAMINOROBERT7IN

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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