The nucleus of this kind of atom is said to be stable. In some atoms the binding energy is not strong enough to hold the nucleus together, and the nuclei of these atoms are said to be unstable. Unstable atoms will lose neutrons and protons as they attempt to become stable..
Beside this, how does an unstable atom gain stability?
An atom is stable if the forces among the particles that makeup the nucleus are balanced. An atom is unstable (radioactive) if these forces are unbalanced; if the nucleus has an excess of internal energy. Instability of an atom's nucleus may result from an excess of either neutrons or protons.
Also Know, how do you know if a nucleus is stable? The principal factor for determining whether a nucleus is stable is the neutron to proton ratio. Stable nuclei with atomic numbers up to about 20 have an n/p ratio of about 1/1. wps.prenhall.com. Above Z = 20, the number of neutrons always exceeds the number of protons in stable isotopes.
Consequently, how does a nucleus become unstable?
Too many neutrons or protons upset this balance disrupting the binding energy from the strong nuclear forces making the nucleus unstable. An unstable nucleus tries to achieve a balanced state by given off a neutron or proton and this is done via radioactive decay.
Why is a heavy nucleus unstable?
The reason nuclei become heavy with increasing atomic number is because there steadily necessary amount of neutrons needed to stabilize the protons. Because of these two factors the nucleus begins to grow unstable and, eventually, break apart.
Related Question Answers
What is the most unstable element?
Francium
How do atoms achieve stability?
If the outer shell is filled, the atom is stable. Atoms with unfilled outer shells are unstable, and will usually form chemical bonds with other atoms to achieve stability. Example of an unstable atom with a single electron in its outer-most shell. In covalent bonds, atoms share electrons to achieve stability.What are the unstable elements?
Unstable elements are those which have only unstable isotopes, such as Uranium.In some atoms the binding energy is not strong enough to hold the nucleus together, and the nuclei of these atoms are said to be unstable.Why are heavier elements unstable?
Reason why heavier nuclei are more unstable lies in electrostatic repulsion of protons, which is stronger than the nuclear force at longer distances. Beta decay commonly occur in isotopes of very light elements and is not based on the mass of a nucleus, but alpha decay is only possible for the very heavy elements.What happens when an atom is unstable?
In some atoms the binding energy is not strong enough to hold the nucleus together, and the nuclei of these atoms are said to be unstable. Unstable atoms will lose neutrons and protons as they attempt to become stable.What makes a compound more stable?
There are a number of things that can make a compound stable. In general, stable compounds are of lower energy and have a balanced charge. So, very loosely, a compound could be said to be stable when it is low in potential energy, has a neutral or spread out charge, and can be used in regular conditions.Does hydrogen have a half life?
Hydrogen (1H) has three naturally occurring isotopes, sometimes denoted 1H, 2H, and 3H. The first two of these are stable, while 3H has a half-life of 12.32 years. The ordinary isotope of hydrogen, with no neutrons, is sometimes called protium.Why Uranium is unstable?
Uranium is naturally radioactive: Its nucleus is unstable, so the element is in a constant state of decay, seeking a more stable arrangement. In fact, uranium was the element that made the discovery of radioactivity possible.What makes a nucleus?
The nucleus is the center of an atom. It is made up of nucleons called (protons and neutrons) and is surrounded by the electron cloud. Neutrons have no charge and protons are positively charged. Because the nucleus is only made up of protons and neutrons it is positively charged.Why would a nucleus change?
The nucleus of an atom can change by alpha emission, beta or positron decay, and electron capture.What holds the nucleus together?
The force that holds a nucleus together is the nuclear force, a short-range force between nucleons. At very small separations, the nuclear force is repulsive, keeping the protons and neutrons from getting too close to one another.Is alpha decay always helium?
In alpha decay, energy and an alpha particle are emitted by a nucleus that is unstable because it has too many protons. An alpha particle consists of two protons and two neutrons, so it is actually a helium nucleus. All radioactive decay is dangerous to living things, but alpha decay is the least dangerous.What makes a material radioactive?
The stability of the nucleus depends on the relative numbers of protons and neutrons present. A substance is said to be radioactive if it contains unstable nuclei and is able to naturally release energy in the process of shedding high speed charged particles, in an attempt to reach a stable state.What determines the name of an element?
The names of elements are determined from their position on the Periodic Table. In the modern Periodic Table, the elements are listed in order by increasing atomic number. The atomic number is the number of protons in the nucleus of an atom of a particular element.What is a stable atom?
An atom is stable because of a balanced nucleus that does not contain excess energy. If the forces between the protons and the neutrons in the nucleus are unbalanced, then the atom is unstable. Stable atoms retain their form indefinitely, while unstable atoms undergo radioactive decay.Which nucleus is more stable?
It is often stated that 56Fe is the "most stable nucleus", but only because 56Fe has the lowest mass per nucleon (not binding energy per nucleon) of all nuclides.What is the stability of a nucleus dependent on?
The stability of an atom depends on the ratio of its protons to its neutrons, as well as on whether it contains a “magic number” of neutrons or protons that would represent closed and filled quantum shells. These quantum shells correspond to energy levels within the shell model of the nucleus.What makes a nuclide stable?
Stable nuclides are nuclides that are not radioactive and so (unlike radionuclides) do not spontaneously undergo radioactive decay. When such nuclides are referred to in relation to specific elements, they are usually termed stable isotopes. The rest have more than one stable isotope.Do all elements have 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 different number of neutrons in its nucleus than some other atom of the same element. Not all isotopes are equally abundant in nature. 
Emma Terry 
