Compléter Summary of chemical bondsVersion en ligne Fill in the blanks par Agustin Caceres 1 All atoms have electrons . However , the ones in the last shell receive the name of electrons . This kind of electrons participate in the formation of bonds . These bonds maintain 2 or more atoms together in order to create a new substance . If the bonded atoms are identical , an is created . Otherwise , a is produced . Depending if the bonded atoms are metals or non - metals , we can distinguish types of bonds : ionic , , and metallic . In ionic bonding , an electron is from the metal to the non - metal . In covalent bonding , the electron ( s ) are between the atoms . In metallic bonding , the electrons are released by the atoms creating a of electrons which makes them excellent conductors .