2.31. Neutrons http://www.ck12.org
http://www.youtube.com/watch?v=Vi91qyjuknM (7:44)
MEDIA
Click image to the left for use the URL below.
URL: http://www.ck12.org/flx/render/embeddedobject/54893FIGURE 2.56
Properties of Neutrons
Unlike protons and electrons, which are electrically charged, neutrons have no charge. In other words, they are
electrically neutral. That’s why the neutrons in the diagram above are labeled n^0. The zero stands for “zero charge.”
The mass of a neutron is slightly greater than the mass of a proton, which is 1 atomic mass unit (amu). (An atomic
mass unit equals about 1.67× 10 −^27 kilograms.) A neutron also has about the same diameter as a proton, or 1.7×
10 −^17 meters.