How did Mendeleev arrange the known elements in his periodic table? O A. According to atomic number
B. According to the number of protons
C. According to the number of electrons
O D. According to atomic mass

You would do 1500/4 and the answer is 375

Hello thereone of the following properties was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version. which property fits this description? answer: atomic mass  was originally used to arrange elements on the periodic table, but is no longer used to organize the modern version.