There are currently 118 known elements on the periodic table, and we've put 20 of them ... What element is Si? Si stands for ...

Its properties were similar to the predicted ones of Mendeleev’s ‘eka-silicon’. The periodic table is a good example of how scientific ideas develop over time. Mendeleev left gaps in his ...

Its properties were similar to the predicted ones of Mendeleev’s ‘eka-silicon’. The periodic table is a good example of how scientific ideas develop over time. Mendeleev left gaps in his ...