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.
Uranium to name one, Technetium Plutonium Californium. The higher the atomic mass generally the more unstable the atom is, starting after iron because iron is the most atomically sound atom.
how the nuclear reactor can work? A nuclear reactor is a system which generates a nuclear fission reaction. A nuclear reaction is a self-sustaining reaction where the output of one stage is the input of the next stage. Therefore, if there is enough fuel, the reaction will continue indefinitely. The most common type of fission reaction is a Uranium 236 reaction. Nuclear fission involves splitting an atom into smaller atom(s). In a U236 reaction, Uranium 235 is the fuel. A neutron is propelled, which strikes the nucleus of a Uranium 235 atom, creating a U236 atom. U236 is highly unstable, and undergoes radioactive decay. This means the U235 atom turns into a Krypton atom, and a Barium atom, plus 2 extra neutrons and some energy. This energy is generally heat, and is absorbed by nearby water, which boils and turns a turbine. The two neutrons continue the reaction by hitting another U235 atom (each). There are other types of nuclear reactions as well, but the principle is the same. The output is generally atoms of different atomic mass, energy, and some other byproduct which will continue the reaction (e.g. an alpha particle - a Helium nucleus, or a neutron). In nuclear fission, the atom byproducts have a lower atomic mass. In nuclear fusion, the atom byproducts have a higher atomic mass (since multiple atoms are fused together). Nuclear fusion is the basic power plant in the core of the sun (combining Hydrogen atoms into Helium, or Helium into Carbon, etc.). The byproduct here is the energy that we see as light. Slow neutron fission chain reaction.
nuclear energy
Nuclear binding energy is what holds the nucleus of an atom together. When an atom is split, some of the binding energy is released. At the level of the atom, it is kinetic energy of the daughter atoms and particles. This is not different from their temperature, and so the nuclear binding energy is turned directly into heat on the fission of the atom. When we speak of nuclear energy, we are often speaking of nuclear power, referring to nuclear power plants. The above answer really works for them also, at the fundamental level.
Every atom contains nuclear energy inside it. That nuclear energy can be released by splitting the atom. The uranium atom is one of the ones that is easier to split. Usually to release the nuclear energy atoms are collided with each other which breaks them releasing the nuclear energy. This is done in a machine called a particle accelerator in which atoms are fired at near the speed of light and when they collide and split they release nuclear energy. I Hope that answers your question.
do you mean uranium? Titanium is a super strong light weight material normally used in aircraft. Uranium is a radio-active highly unstable atom.
Nuclear reactions change the composition of an atom's nucleus, hence nuclear reaction.
The nuclear atom was discovered by Ernest Rutherford. He did it with a gold foil experiment.
hydrogen atom is broken to create nuclear fission
Uranium to name one, Technetium Plutonium Californium. The higher the atomic mass generally the more unstable the atom is, starting after iron because iron is the most atomically sound atom.
Nuclear change is the change in the nucleus of the atom.
Atom bomb. Get it? Atom :D
No, it is a part of an atom.
By a nuclear reaction
how the nuclear reactor can work? A nuclear reactor is a system which generates a nuclear fission reaction. A nuclear reaction is a self-sustaining reaction where the output of one stage is the input of the next stage. Therefore, if there is enough fuel, the reaction will continue indefinitely. The most common type of fission reaction is a Uranium 236 reaction. Nuclear fission involves splitting an atom into smaller atom(s). In a U236 reaction, Uranium 235 is the fuel. A neutron is propelled, which strikes the nucleus of a Uranium 235 atom, creating a U236 atom. U236 is highly unstable, and undergoes radioactive decay. This means the U235 atom turns into a Krypton atom, and a Barium atom, plus 2 extra neutrons and some energy. This energy is generally heat, and is absorbed by nearby water, which boils and turns a turbine. The two neutrons continue the reaction by hitting another U235 atom (each). There are other types of nuclear reactions as well, but the principle is the same. The output is generally atoms of different atomic mass, energy, and some other byproduct which will continue the reaction (e.g. an alpha particle - a Helium nucleus, or a neutron). In nuclear fission, the atom byproducts have a lower atomic mass. In nuclear fusion, the atom byproducts have a higher atomic mass (since multiple atoms are fused together). Nuclear fusion is the basic power plant in the core of the sun (combining Hydrogen atoms into Helium, or Helium into Carbon, etc.). The byproduct here is the energy that we see as light. Slow neutron fission chain reaction.
The breaking apart of the nucleus of an atom is called nuclear fusion.
an atom