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08-07-2019
Chemistry

contestada

When Mendeleev started his work on organizing the elements, about how many had
been discovered?
about 10
well over 100
about 60
the same as today

Respuesta :

08-07-2019

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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