Who is credited with the initial creation of the Periodic Table in the 19th century? Dmitri Mendeleev Marie Curie Antoine Lavoisier Robert Boyle None What property did Mendeleev use to organize elements in his periodic table? Atomic number Atomic mass Density Melting point None Which element was the first to be discovered through the gaps predicted by Mendeleev's periodic table? Helium Francium Gallium Polonium None Who proposed the modern periodic law, stating that the properties of elements are a periodic function of their atomic numbers? John Dalton Niels Bohr Henry Moseley Ernest Rutherford None What is the total number of elements in the modern periodic table? 92 104 109 118 None Time's up
