ISSN 2398-2942      

Radiography: basic physics

icanis
Contributor(s):

The atom

  • All chemical elements are made of atoms.
  • Atoms consist of a core (nucleus) of protonswhich are positively charged surrounded by a cloud of electronswith a negative charge.
  • Normally there are the same number of electrons as protons in the atom so that it has no charge overall.
  • Anionis an atom that has lost or gained electrons giving it an overall positive or negative charge respectively.
  • The electrons circle the nucleus in pre-determined orbits (shells).
  • Each shell contains a pre-set number of electrons and each shell can be defined by its energy level.
  • Electrons can move from inner orbits to outer ones but moving between shells requires energy.
  • This energy can be released if the electron moves back to an inner shell.

X-Rays

This article is available in full to registered subscribers

Sign up now to start a free trial to access all Vetlexicon articles, images, sounds and videos, or Login

Further Reading

Publications

Refereed papers

Want more related items, why not
contact us

Can’t find what you’re looking for?

We have an ever growing content library on Vetlexicon so if you ever find we haven't covered something that you need please fill in the form below and let us know!

 
 
 
 

To show you are not a Bot please can you enter the number showing adjacent to this field