5. The electrons with no mass, ........................... the nucleus in series of orbits. The first orbit closer to the nucleus holds a maximum of 2 electrons, the second a maximum of 8 electrons, and the third a maximum of .....................respectively. 6. The electrons occupying the outer orbit are called the .................... electrons. These electrons take part in chemical reaction or bonding. There are ................... types of chemical bonding. The one that is involve with the transfer of valence electrons from one atom to the other is called .......................bonding, whiles the one that is involve with sharing of valence electrons is called ....................... bonding.
