Question

Mendeleev found that the properties of the known elements followed a pattern that repeated every
a.7 elements.
b.5 elements.
c.14 elements.
d.10 elements.

Answer 1

Answer:

14 elements

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Answer 2

Answer:

The answer will be A. 7 elements

Explanation:

I took a test and I got it right hope this helps<3 ^^