An electron source is a bond or a lone pair of electrons. It is either a p bond or a lone pair on an atom of relatively high electron density in a molecule or ion, or a bond that must break during a reaction. An electron sink is an atom on a molecule or ion that can accept a new bond or lone pair of electrons.
What Military Threat Does North Korea Pose? It is impossible to say whether the recent threats from North Korea constitute a clear and immediate danger or whether the strong threats are just bluster in order to extract food aid and technical assistance from the international community.
South Korea, too, regards North Korea its main enemy but North Korea does not regard South Korea its main enemy because South Korea is a client state of the United States and has no ability or power to act independent of the US. North Korea's war plan is not for invading South Korea but for destroying the US.