In one mole, there are 6.022 x 10 23 atoms. Here's another way: there are 6.022 x 10 23 atoms of carbon in 12 grams of carbon-12. Let's say that real clearly: one mole of ANYTHING contains 6.022 x 10 23 entities. The word entities is simply a generic word.
Shadow zone. A seismic shadow zone is an area of the Earth's surface where seismographs cannot detect an earthquake after its seismic waves have passed through the Earth. When an earthquake occurs, seismic waves radiate out spherically from the earthquake's focus.
The mesopelagic zone is one of the five major vertical divisions of the oceans. The nominal depth delineation of this zone is between 200 and 1000 meters below the ocean surface. Due to the limited sunlight penetration to the depths of this zone, it is frequently termed the twilight zone. The ocean zone above the mesopelagic is known as the epipelagic zone and the vertical region immediately below is the bathypelagic zone.