184_notes:charge_and_matter

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision		 Previous revision
Next revisionBoth sides next revision
184_notes:charge_and_matter [2021/01/24 23:49] – bartonmo184_notes:charge_and_matter [2021/01/25 00:02] – bartonmo
Line 28: Line 28:
 If we start with a neutral atom by itself, we know that there will be a positive nucleus with a negative, circular electron cloud around it. The electron cloud is circular (spherical in 3D) because it is equally likely that the electrons are anywhere around the nucleus (shown in Figure 2a/3a).  If we start with a neutral atom by itself, we know that there will be a positive nucleus with a negative, circular electron cloud around it. The electron cloud is circular (spherical in 3D) because it is equally likely that the electrons are anywhere around the nucleus (shown in Figure 2a/3a). 
  
-**What would change about our atom if we put a charge next to a neutral atom?** +//What would change about our atom if we put a charge next to a neutral atom?//
  
 The electrons cannot leave their nucleus (unless [[https://en.wikipedia.org/wiki/Ionization|the interaction is very strong]]), but they are attracted to the positive charge. With a positive charge nearby, it is now more likely that the electrons will be on the left side of nucleus compared to the right (shown in Figure 2b), shifting the electron cloud toward the positive charge. Often, we will simplify this drawing to be just an oval that indicates which side of the atom is more positive and which side is more negative (shown in Figure 2c).   The electrons cannot leave their nucleus (unless [[https://en.wikipedia.org/wiki/Ionization|the interaction is very strong]]), but they are attracted to the positive charge. With a positive charge nearby, it is now more likely that the electrons will be on the left side of nucleus compared to the right (shown in Figure 2b), shifting the electron cloud toward the positive charge. Often, we will simplify this drawing to be just an oval that indicates which side of the atom is more positive and which side is more negative (shown in Figure 2c).  
Line 41: Line 41:
  
 === Insulators === === Insulators ===
-An insulator is an object or material where the electrons are tightly bound to the nucleus. This means that the electrons in an insulator can only move very small amounts and must stay close to their nuclei. //**Charges cannot move freely through an insulator.**// Common insulators include: plastic, glass, rubber, paper, wood, etc. +An insulator is an object or material where the electrons are tightly bound to the nucleus. This means that the electrons in an insulator can only move very small amounts and must stay close to their nuclei. **Charges cannot move freely through an insulator.** Common insulators include: plastic, glass, rubber, paper, wood, etc. 
  
 [{{  184_notes:insulatorpos.png?150|Charge distribution in an insulator from a positive charge}}] [{{  184_notes:insulatorpos.png?150|Charge distribution in an insulator from a positive charge}}]
  • 184_notes/charge_and_matter.txt
  • Last modified: 2021/01/25 00:06
  • by bartonmo