The periodic table’s arrangement also allows scientists to discern trends in element properties ... Since then, the periodic table has evolved to reflect over 150 years of scientific development and ...

His principal contribution to chemistry was the 'vis tellurique' (telluric screw), a three-dimensional ... with elements with the same valency arranged in vertical lines, strikingly similar to ...

The green chemistry principle of atom economy applies to chemical reactions, and minimizes waste down to the molecular level. This exercise uses molecular models to calculate atom economy for a ...

Thanks to Moseley’s work it now became possible to place elements in the periodic table according to their atomic number rather than their atomic weight. Today the periodic table is the starting point ...

The questions in this quiz are suitable for GCSE chemistry students studying Mendeleev's periodic table, electronic structure and the modern periodic table. If you struggled with the quiz ...

That chemistry helped them come back in the mixed doubles table tennis match on July 26, beat the Chinese team for the first time, and secure Japan’s first-ever Olympic gold medal in the sport.