0
What else can I help you with?
What very large nuclei tend to be unstable?
Nuclei with very large atomic numbers, such as those above Z=83, tend to be unstable due to the increasing electrostatic repulsion between protons. This can lead to spontaneous radioactive decay in the form of alpha decay, beta decay, or fission.
Why unstable nuclei with short half-lives have small or zero natural abundance?
It should be very clear why nuclei with short half-lives have small or zero natural abundance. They simply are simply too unstable to exist and will decay into a more stable form. Naturally abundant nuclei will have half lives that are longer than the age of the Earth.
What makes a nucleus unstable?
The strong nuclear force doesn't balance the electrostatic force.
What is the most highly active atom in the nuclear atom system?
If you are looking for the most chemically reactive atom or element, it is fluorine. As regards which atom is the most active in its nucleus, there are a lot of very unstable radioactive atomic nuclei. Some are so unstable that they can only exist for a small fraction of a second, or, more properly, have an extremely short half-life.
Why are collisions between the nuclei difficult to achieve?
Atomic nuclei usually have a positive charge, so they will tend to repel each other. A neutron on the other hand, carries no charge and may easily interact with either the electron shells, or with the nucleus.
What very large nuclei tend to be unstable?
Nuclei with very large atomic numbers, such as those above Z=83, tend to be unstable due to the increasing electrostatic repulsion between protons. This can lead to spontaneous radioactive decay in the form of alpha decay, beta decay, or fission.
Why heavy nuclei are unstable?
Heavy nuclei are unstable due to the repulsive forces between protons in the nucleus, which increases with the number of protons. This can lead to spontaneous decay processes, such as alpha decay or fission, in order to achieve a more stable configuration with a lower energy state. Additionally, the binding energy per nucleon decreases for very heavy nuclei, making them more prone to decay.
What is the difference between nuclear decay fission and fusion?
decay; alpha (helium nuclei), beta (electrons or positrons), or gamma (photons) are spontaneously ejected from unstable isotopesfission; very massive unstable isotopes split into two much lighter nuclei and a few neutrons are ejected, usually happens following capture of a neutron but in some isotopes can occur spontaneouslyfusion; very light nuclei merge forming heavier nuclei, can only occur at very high temperature and pressure
What aspects of the composition of a nucleus can cause it to be unstable?
The two aspects that cause the nucleus of any element atom to be unstable are:not have the specific neutron/proton ratio to be a stable nucleus, and orhaving number of protons that exceeds the stability limit (exceeding 83).Referring to question below for more information.
Where would a very unstable metal most likely be located in the periodic table of elements?
They would be one of the alkali earth metals. Since alkali metals only have one valence electron it is very easy for it to react. The lower you go down a column the more reactive it would be since its further away from the nucleus.
What is the difference between nuclear decay and nuclear fission?
Nuclear decay is any spontaneous process where unstable nuclei release extra energy to arrive at a more stable state. Typical decay processes are Alpha, Beta, and Gamma. Some large unstable nuclei (e.g. Plutonium-240) can sometimes decay by spontaneous fission.Nuclear fission is a process where certain large nuclei (e.g. Uranium-235 & Plutonium-239) absorb a neutron and then split into two smaller nuclei and a few free neutrons. Some large unstable nuclei (e.g. Plutonium-240) don't need to be hit by a neutron to fission.Nuclear fusion is a process where small nuclei under unusual conditions of very high temperature and very high pressure combine to form larger nuclei.All three processes above are exothermic.In stars nuclear fusion stops at nickel and iron (further fusion past this would be endothermic). If all we had was the above processes then that would be where the periodic table ended (therefore there could not be nuclear fission as such heavy nuclei could not exist). However stars die, and some die so spectacularly we call them supernovas.When a supernova occurs, an intense shock wave blows all the outer layers of the star away at very high velocity. At these velocities nuclei collide so hard that normally impossible endothermic nuclear fusion reactions occur. The rest of the periodic table is filled here, including many transuranics not found naturally on earth (e.g. Americium, Californium, Berkelium).
What is the composition of radioactivity?
Radioactivity is the emission of radiation from unstable atomic nuclei. It can be in the form of alpha particles (helium nuclei), beta particles (electrons or positrons), or gamma rays (high-energy photons).
Why unstable nuclei with short half-lives have small or zero natural abundance?
It should be very clear why nuclei with short half-lives have small or zero natural abundance. They simply are simply too unstable to exist and will decay into a more stable form. Naturally abundant nuclei will have half lives that are longer than the age of the Earth.
How is nuclear energy formed?
Some nuclei, notably U235 and Pu239, can be made to cause a chain reaction where neutrons are produced in nuclear fission, and propogate more subsequent neutrons so that a steady rate of fissions can be achieved. Each fission releases an amount of energy in the form of heat, which is then used in generating plant similar to that in a fossil fuelled power plant.
What should I do if my wife is mentally unstable?
If your wife is mentally unstable then you need to realize that she has no place in a stable marriage. My wife was mentally unstable and popped xanax's and drank everyday. She eventually went to rehab and found a man and left me for him. Was I upset? Yes, very much so. Did I want her back? Yes. But now after realizing how much emotional pain an unstable woman can cause you, it was for the best. Mentally unstable people also tend to be very selfish, and pathological liars to hide their problems. I didn't need it and neither do you.
What are the disadvantages of using a cheap longboard?
The disadvantages of using a cheap longboard are that they tend to be made of stiffer wood and when you ride the longboard there is no give or flexibility which gives a very unstable ride.
What element do you get if you fuse two helium nuclei together?
Nuclear fusion occurs when two nuclei fuse together. This is frequently nuclei of deuterium and tritium (both hydrogen isotopes), which form a helium nucleus plus a neutron.
