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olya-2409 [2.1K]
3 years ago
11

When Mendeleev started his work on organizing the elements, about how many had

Chemistry
1 answer:
Talja [164]3 years ago
8 0

Answer:

About 60.

Explanation:

Mendeleev knew of 63 elements. He wrote their properties on cards and arranged them in order of atomic mass.

That's how he discovered that the properties of elements are periodic functions of their atomic masses.

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