The document discusses the structure of atoms. It explains that atoms are comprised of protons, neutrons, and electrons. It also mentions that there are four fundamental forces that interact with these subatomic particles and hold the atom together. Additionally, the document notes that isotopes are atoms of the same element that have different numbers of neutrons.

1. ATOMIC STRUCTURE S.MORRIS 2006 This Powerpoint is hosted on www.worldofteaching.com Please visit for 100’s more free powerpoints

6. When matter and antimatter particles collide they annihilate into energy, radiation

9. HELIUM ATOM + N N + - - proton electron neutron Shell What do these particles consist of?

14. Quarks are one type of matter particle. Most of the matter we see around us is made from protons and neutrons, which are composed of quarks. More info on quarks: http://www.particleadventure.org/frameless/quarks.html

26. The atom is comprised of three major particles—protons, neutrons and electrons. There are four forces (Electromagnetic, Strong, Weak, and Gravity) that are responsible for the behavior of the particles and thus keep the atom together .