When light hits solar cells, so-called electron-hole pairs are created: the electrons are excited and can move almost freely ...

1. Draw the electronic configuration of each atom – one element with dots and the other with crosses. 2. Work out how many electrons need to be transferred. 3.

The paper included the accompanying Table, which shows the distribution of electrons into groups corresponding to the principal quantum numbers for all the elements and at the same time preserves ...

The historical development of the electronic configuration model is traced and the status of the model with respect to quantum mechanics is examined. The successes and problems raised by the model are ...