The answer is c.) Rutherford model
Distance= Speed x Time
1hr=60mins
60mins=3600 secs
20 x 3600=72000
72000 is your answer.
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In his version of the periodic table, Mendeleev based his arrangement of the elements on an element's atomic mass.
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8 protons in oxygen bc it has an atomic number of 8
Compounds. They both have more than one element in them
