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Isotope - Wikipedia


Isotopes are variants of a particular chemical element which differ in neutron number. ..... Of 35 primordial radionuclides there exist four even-odd nuclides ( see table at right), including the fis...

Why do isotopes exist? | Reference.com


Isotopes exist because the atomic nuclei of many elements are stable or somewhat stable with different numbers of neutrons in them. Because the identity of an ...

How it works - Isotopes - Atoms and Elements, The nucleus and ...


Due to their high levels of radioactivity, they exist only for extremely short ... the same number of neutrons as it does protons and electrons: some do, but this is ...

isotope | chemistry | Britannica.com


Oct 4, 2010 ... Isotope, one of two or more species of atoms of a chemical element ..... numbers of protons and neutrons occur more often than do isotopes ...

Isotopes - Chemistry LibreTexts


Jul 16, 2015 ... Carbon, for example, has two naturally occurring isotopes, 6 12 C and ..... 137 C s and 90 S r do not occur naturally and are only present in the ...



An isotope is one of two or more species of atoms of a chemical element with the ... that isotopy might exist in the main group of naturally occurring stable elements . ... Some of these, such as uranium, do occur naturally because their isotopes ...

Natural Isotopes - SOEST - University of Hawaii


What are Natural Isotopes? Isotopes are atoms of the same element with different masses. They get these ... Stable, isotopes, on the other hand, do not decay.

Mass number and isotopes - A level chemistry


AQA chemistry specification Atomic Structure - Mass number and isotopes.

Chemistry for Kids: Isotopes - Ducksters


Kids learn about the science of isotopes in chemistry including naming isotopes, hydrogen, ... Many elements only exist in an unstable or radioactive form.



Isotopes. Most atoms have several naturally occurring isotopes (click here for a list of elements that have no isotopes). An isotope is an atom which contains a ...

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Why do isotopes exist? - Chemical Forums


Because they can? If a nucleus can exist with the same number of protons, but different numbers of electrons...then it will at some point ...

Were isotopes created from radioactive elements or they exist from ...


All atoms was created, they didn't exists from the beginning. Well, H atoms (one ... Some occur naturally (such as Uranium-235) and some do not. Some isotopes, stable or otherwise, can be created from other isotopes, stable ...

Chem4Kids.com: Atoms: Isotopes


This tutorial introduces the basics of isotopes. ... Isotopes are atoms of elements with different numbers of neutrons ... That type of atom is called an isotope. ... Also, we do not collect or ask for personally identifiable information on any of our  ...