How did dmitri mendeleev organize the periodic table

According with atomic weight and valences

Explanation:

Mendeleev organized the periodic table according atomic weight because the elements exhibit an apparent periodicity of properties, and the magnitude of the weight determines the character of the element

what does the table look like

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

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