NEW: Find great deals on the latest gadgets and more in the ScienceDaily Store!
Reference Terms
from Wikipedia, the free encyclopedia


Isotopes are forms of an element whose nuclei have the same atomic number–-the number of protons in the nucleus--but different mass numbers because they contain different numbers of neutrons.

Note:   The above text is excerpted from the Wikipedia article "Isotope", which has been released under the GNU Free Documentation License.
Related Stories

Share This Page:

Science News
October 21, 2016

Latest Headlines
updated 12:56 pm ET