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.
Earthquakes occur in wellâdefined belts that correspond to active plate tectonic zones. The circumâPacific belt (also called the Rim of Fire) follows the rim of the Pacific Ocean and hosts over 80 percent of the world's shallow and mediumâdepth earthquakes and 100 percent of the deep earthquakes.