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science review 1.

science review

why did Mendeleev leave spaces in the periodic table? So that new elements could be discoverd.
Mendeleev arranged the elements into rows of? Increasing mass.
What two elements have similar properties? Chlorine and Bromine.
True or False, Mendeleev was the first scientist to arrange elements into a periodic table? False.
True or False, the modern periodic table is arranged by increasing protons? False.
Name three catigories into wich elements are classified based on genral properties. Metals Nonmetals Metalloids.
What two elements in period 3 are the most reactive? sodium and chlorine.
Name in order the three highly reactive elements in period 1 Lithium,Sodium,Potassium.
Created by: fabianw