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Radioactive decay - Wikipedia


Radioactive decay is the process by which the nucleus of an unstable atom loses energy by ..... Radioactive decay is seen in all isotopes of all elements of atomic number 83 (bismuth) or greater. .....

What happens to the atomic nuclei of unstable isotopes during ...


In every instance where an unstable isotope undergoes radioactive decay, one or more atoms with a different number of protons than the decaying atom are ...

What happens to the atomic nuclei of unstable isotopes during ...


here are the choices. A. give off nuclear radiation. B. are broken down by radioactive bacteria. ... Unstable atomic nuclei decay over time into stable nuclei causing a mineral to be? radioactive. 1 person found this useful. Edit. Share to:.

ChemTeam: Answers to General Radioactivity Questions


4) The process in which the nuclei of unstable atoms can become more stable by ... of an atom into another kind of atom that takes place during radioactive decay. ... 23) The half-life of a given isotope can be altered by heat, pressure, or some ...

Radioactivity and Radioisotopes - NDE/NDT Resource Center


Atoms with unstable nuclei are constantly changing as a result of the ... When the nucleus loses a neutron, it gives off energy and is said to be radioactive.

Radioactive decay


Aug 9, 2000 ... Each nucleus can be characterized by two numbers: A, the atomic mass number, ... Nuclei with more than 83 protons are all unstable, and will eventually break up ... During radioactive decay, principles of conservation apply.

BBC - GCSE Bitesize Science - Radioactive decay : Revision


Back. Next. The nuclei of some isotopes are unstable and emit radiation. ... isotopes. Unstable nuclei split up in a process called radioactive decay and emit radioactive radiation. ... A = atomic mass (number of protons + neutrons). Z = atomic ...

Basic Nuclear Science Information


Mar 30, 2007 ... Nuclear Structure | Radioactivity | Alpha Decay | Beta Decay |Gamma ... The number of protons in the nucleus, Z, is called the atomic number. ... are approximately 270 stable isotopes, and more than 2000 unstable isotopes.

List the Three Types of Radiation Given Off During Radioactive Decay


The theory states that an atomic nucleus consists of two subatomic particles: ... uranium isotopes are unstable, causing them to decay and produce radiation.

radioactivity facts, information, pictures | Encyclopedia.com articles ...


Atoms that are radioactive emit radioactivity during spontaneous transformation from ... radiation emitted by certain unstable isotopes during radioactive decay. .... The nuclei of elements exhibiting radioactivity are unstable and are found to be ...

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What happens to the atomic nuclei of unstable isotopes during ...


If you really want to understand what happens in the atomic nuclei of unstable isotopes, you have to study the weak interaction, which is responsible ...

Isotopes and Radioactivity Tutorial


Radioactive isotopes (also called radioisotopes) have unstable nuclei. ... Some isotopes release an alpha particle during nuclear disintegration; an alpha ... When an isotope emits a beta particle, it decays to a daughter with an atomic number ...

The Process of Natural Radioactive Decay - dummies


Certain naturally occurring radioactive isotopes are unstable: Their nucleus breaks apart, ... The radioactivity corresponds to the neutron/proton ratio in the atom:.