Elements are arranged in the periodic table in order of increasing atomic number. For example hydrogen has the atomic number of one, helium two, lithium three etc. The first energy level (the one ...

Try listening to these revision podcasts from Bitesize and ... Pea guide you through everything you need to know about atomic structure and the periodic table to ace your GCSE science exam.

and the apparently widely different assumptions which have been introduced in various recent attempts to develop a theory of atomic constitution capable of accounting for other physical and ...