Nuclear transformation The change of one element into another

Nuclear atom an atom having a dense center of positive charge (the nucleus) with electrons moving around the outside. (2.5) Nuclear transformation the change of one element into another. (21.3)... 

In 1919 Lord Rutherford observed the first nuclear transformation, the change of one element into another. He found that bombarding with a particles produced the nuclide... 

Nuclear transformation the change of one element into another. 

Nuclear transformation the change of one element into another. (20.3)... 

But chemistry is not only about matter that is just sitting there. Just as importantly, if not more so, chemistry is also the science of changes, or transformations, of matter. At a nuclear level—a scale smaller than an atom itself—these changes maybe the transmutation of one element into another element At the level of whole atoms and molecules, these changes involve the processes of breaking chemical bonds and forming new bonds with the result that one set of chemical substances—or mixtm-es of substances—are transformed into a new set of substances that may have properties that differ completely from those of the original materials. 

Transmutation is the act of changing a substance, tangible or intangible, from one form or state into another. To the alchemists of old, this meant the conversion of one physical substance into another, particularly base metals such as lead into valuable silver and gold. To the modern scientists, this means the transformation of one element into another by one or a series of nuclear decays or reactions. 

In order to end up with an element that was not in the reactants, the particles in the nucleus of an atom—the protons and neutrons—would have to change. This is a different type of reaction, called a nuclear reaction. Some nuclear reactions occur naturally in elements that are described as radioactive. The nuclei of radioactive elements are unstable. Since they are unstable, they can fall apart and give off subatomic particles. Eventually, through a process called radioactive decay, these unstable elements are transformed into a stable (non-radioactive) element. When an atom of one element is changed into an atom of another element through a nuclear reaction, it is called transmutation. 

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