Mendeleev discovered the periodic table (or Periodic System ... The real genius of Mendeleev’s achievement was to leave gaps for undiscovered elements. He even predicted the properties of five of ...

However, the modern periodic table arranges the elements by increasing atomic number, rather than atomic mass. Mendeleev recognised that not all elements had been discovered yet. He left gaps in ...

Four have filled gaps in the periodic table of 92 elements and five have extended it beyond uranium By I. Perlman & G. T. Seaborg Join Our Community of Science Lovers!

However, the modern periodic table arranges the elements by increasing atomic number, rather than atomic mass. Mendeleev recognised that not all elements had been discovered yet. He left gaps in ...