Look up: isotope

1. 
   isotope
   One of two or more variations of the same chemical element, differing in the number of neutrons not the number of protons.
   Found on http://www.ucmp.berkeley.edu/glossary/gl
   
   
2. 
   Isotope
   An isotope of an element is another form of the same element that has a different number of neutrons in the nucleus (giving it a different atomic weight).
   Found on http://www.enchantedlearning.com/subject
   
   
3. 
   Isotope
   An isotope is a form of an element which has a different atomic weight and nuclear properties than other isotopes of the same element.
   Found on http://www.encyclo.co.uk/nol.php
   
   
4. 
   Isotope
   One of two or more atoms having the same number of protons in its nucleus, but a different number of neutrons and, therefore, a different mass.
   Found on http://hesperia.gsfc.nasa.gov/sftheory/g
   
   
5. 
   Isotope
   atoms of the same element having the different masses.
   Found on http://www.tulane.edu/~bmitche/book/glos
   
   
6. 
   Isotope
   A variation of an element that has the same atomic number of protons but a different weight because of the number of neutrons. Various isotopes of the same element may have different radioactive behaviors, some are highly unstable..
   Found on http://www.epa.gov/OCEPAterms/
   
   
7. 
   Isotope
   One of two or more forms of an element that have the same number of protons (atomic number) but differing numbers of neutrons (mass numbers). Radioactive isotopes are commonly used to make DNA probes and metabolic tracers.
   Found on http://filebox.vt.edu/cals/cses/chagedor
   
   
8. 
   Isotope
   An atom with a specified number of protons and a specified number of neutrons.
   Found on http://www.csc.noaa.gov/text/glossary.ht
   
   
9. 
   isotope
   One of two or more atoms that have the same atomic number (i.e., the same number of protons in their nuclei) but have different mass numbers.
   Found on http://cdiac.ornl.gov/glossary.html
   
   
10. 
    Isotope
    Isotopes are different atoms of the same element, therefore having the same number of protons, but containing a different number of neutrons. Their relative masses are different because it is essentially the protons and neutrons in the nucleus that make up the mass of the atom. Chlorine, for example, has two naturally occurring isotopes, chlorine-35 and chlorine-37.
    Found on http://www.avogadro.co.uk/definitions/is
    
    
11. 
    Isotope
    An isotope represents Atoms of the same Element that have the same number of Protons but a different number of Neutrons . They therefore have different Atomic Masses but the same chemical properties. A radio-isotope is an isotope which is Radioactive .
    Found on http://www.ionactive.co.uk/glossary_atoz
    
    
12. 
    isotope
    [n] - one of two or more atoms with the same atomic number but with different numbers of neutrons
    Found on http://www.webdictionary.co.uk/definitio
    
    
13. 
    Isotope
    Nuclides with the same number of protons but different numbers of neutrons.
    Found on http://www.shponline.co.uk/glossary.asp?
    
    
14. 
    Isotope
    An atomic form of an element having a particular number of neutrons. Different isotopes of an element have the same number of protons but different numbers of neutrons and hence different atomic mass, eg. U-235, U-238. Some isotopes are unstable and decay (qv) to form isotopes of other elements
    Found on http://www.world-nuclear.org/info/inf51.
    
    
15. 
    Isotope
    One of perhaps several different species of a given chemical element with the same number of protons, which are distinguishable by variations in the number of neutrons in the atomic nucleus but indistinguishable by chemical means.
    Found on http://www.contractorsunlimited.co.uk/to
    
    
16. 
    isotope
    isotopic; isotopy. Compare with isomer, allotrope, isobar, and isotone. Atoms or ions of an element with different numbers of neutronsin their atomic nucleus. Isotopes have the same atomic number but different mass number. Isotopes have very similar chemical properties but sometimes differ greatly in nuclear stability.
    Found on http://antoine.frostburg.edu/chem/senese
    
    
17. 
    Isotope
    atoms of the same element having the different masses.
    Found on http://www.chemicalglossary.net/definiti
    
    
18. 
    Isotope
    A variation of a normal chemical substance, which is radioactive. Can be used to diagnose or treat cancer. For example, Sr89 is an isotope of strontium used to treat bone cancer.
    Found on http://www.cancerhelp.org.uk/glossary.as
    
    
19. 
    Isotope
    An atomic form of an element having a particular number of neutrons. Different isotopes of an element have the same number of protons but different numbers of neutrons and hence different atomic mass, eg. U-235, U-238. Some isotopes are unstable and decay (qv) to form isotopes of other elements.
    Found on http://www.energy-choices.com/index.php?
    
    
20. 
    isotope
    An element that has more or less neutrons than normal. Many isotopes are radioactive
    Found on http://www.fisicx.com/quickreference/sci
    
    
21. 
    Isotope
    Atoms of the same element with the same atomic number ( the same number of protons) but with different numbers of neutrons an hence different weights.
    Found on http://www.mpoweruk.com/glossary.htm
    
    
22. 
    Isotope
    An atomic form of an element having a particular number of neutrons. Different isotopes of an element have the same number of protons but different numbers of neutrons and hence different atomic masses, e.g., U-235 and U-238.
    Found on http://www.theiet.org/factfiles/energy/n
    
    
23. 
    Isotope
    Isotope: A form of a chemical element with the same atomic number as another element but having a different atomic mass. Isotopes are used in a number of medical tests.
    Found on http://www.medterms.com/script/main/art.
    
    
24. 
    isotope
    nuclides having the same atomic number and thus identical chemical properties Category: Management in the public and private sector • one of a set of nuclides having the same number of protons,hence constituting the same chemical element but differing in number of neutrons Category: Physics • Any of two or more species of atoms of a chemical element with the same atomic num...
    Found on http://www.mijnwoordenboek.nl/definition
    
    
25. 
    isotope
    <radiobiology> One of several nuclides having the same number of protons in their nuclei and hence having the same atomic number, but differing in the number of neutrons and therefore, in the mass number. Almost identical chemical properties exist between isotopes of a particular element. The use of this term as a synonym for nuclide is to be ...
    Found on http://www.mondofacto.com/facts/dictiona