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.
As a result, only P-Waves will be received on the side of the Earth opposite the earthquake epicenter. This zone is called the S-Wave Shadow Zone .As P-Waves and S-Waves travel through the interior of the Earth, they pass through materials of different density.As they pass through more dense materials, their speed increases causing them to change direction.s a result, only P-Waves will be received on the side of the Earth opposite the earthquake epicenter. This zone is called the S-Wave Shadow Zone .As P-Waves and S-Waves travel through the interior of the Earth, they pass through materials of different density.