Since then, the periodic table has evolved to reflect over 150 years of scientific development and understanding in chemistry and physics. Today, with 118 known elements, it is widely regarded as one ...

Today the periodic table is the starting point for understanding chemistry. On the wall of every laboratory or school chemistry department you are likely to find hung a copy where chemists and student ...

Try these interactive flashcards based on GCSE chemistry past papers ... Mendeleev's periodic table, groups in the periodic table and transition metals. Atomic structure and the periodic table ...