GK
NUCLEAR SCIENCE
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
the atom emits radiation
|
|
|
the nucleus is unstable due to an off balance ratio of protons to neutrons
|
|
|
the nucleus changes to become stable
|
|
|
all of the above
|
Detailed explanation-1: -Radioactive elements are made up of atoms whose nuclei are unstable and give off atomic radiation as part of a process of attaining stability. The emission of radiation transforms radioactive atoms into another chemical element, which may be stable or may be radioactive such that it undergoes further decay.
Detailed explanation-2: -Elements that emit ionizing radiation are called radionuclides. When it decays, a radionuclide transforms into a different atom-a decay product.
Detailed explanation-3: -Radioactive elements are an unstable form of elements in an atomic nucleus with an excess nuclear charge, which will produce a spontaneous release of radiation. The four common radioactive elements are Uranium, Radium, Polonium, and Thorium.
Detailed explanation-4: -An element is radioactive when its nuclei decay, or break down.