Nuclear Physics

The masses of protons and neutrons are on the order of 1x10-27 kg. The mass of an electron is on the order of 1x10-30 kg. So protons and neutrons, the particles found in a nucleus, weigh around 1000 times as much as the electrons outside the nucleus. So take helium-4 for example: 2 protons, 2 neutrons, and 2 electrons. Its nucleus is around 2000 times more massive than its two electrons. The term "concentrated" is also worth noting. Atoms are much, much, much bigger than their nuclei. A good analogy I often use for this is that if you put a penny in the middle of Giant's stadium, the atom would be the size of the stadium and the penny would be the size of a nucleus. A more specific example would be that the nucleus of a carbon atom has a radius of around 2x10-15 m, and the radius of a carbon atom is around 8x10-11 m. So the nucleus is 40,000 times smaller than the atom.

Mass is converted into energy through nuclear fission in a nuclear power station. The energy is used to generate electricity, which is then transmitted through power lines to a residential area. In the house, the electricity powers the washing machine, which consumes the energy to clean clothes.

Helium has two naturally occurring isotopes, 3He and 4He. Both are stable, so helium does not undergo decay in nature. Several synthetic isotopes exist.

5He is highly unstable and decays to 4He by emitting a neutron.

6He undergoes negative beta decay, producing 6Li. It has the longest half-life of any radioactive helium isotope, at 0.808 seconds.

7He is highly unstable and decays to 6He by emitting a neutron.

8He undergoes negative beta decay, followed immediately by emitting of a neutron, producing 7Li. Its half-life is 0.122 seconds.

9He is highly unstable and decays to 8He by emitting a neutron.

10He is highly unstable and decays to 9He by emitting a neutron.

The second magic number in nuclear physics is 50. Nuclei with 50 protons or 50 neutrons tend to have increased stability, as they fill a complete shell of nucleons. This means that nuclei with proton or neutron numbers close to 50 often exhibit magic properties.

The radiation sign is posted to warn individuals of their proximity to a source of radiation. The sign is non-specific in that it does no specify a type of radioactivity or what source is involved. Other signs or cues will have to be observed to gather more details. For instance, if you are in a nuclear power plant, the radiation hazards are associated with the reactor itself. Gamma rays and neutron radiation might be encountered under certain conditions, and all precautions must be observed. A link can be found below for more information. It would be a good idea to check out the signs because they have and are continuing to change.

It is the nucleus of the atom that undergoes change during radioactive decay.

Yes, the atomic weight of the protons and neutrons in an atom (the 2 particles that make up the nucleus) is 1 for each of them. The other particle in an atom is an electron. The atomic weight of an electron is 1/1840 so it is often considered negligible.

Gamma rays are already polarized due to their quantum nature and the way they are emitted from their source. It is not possible to further polarize gamma rays using traditional methods like filters or polarizers that are effective for polarizing electromagnetic waves in lower energy ranges.

They don't. Only atoms really have an atomic number, which is the number of protons in each atom, so when that number changes as in alpha and beta radiation the atom no longer has a neutral charge and becomes an ion. Gamma radiation is an electro-magnetic wave so it doesn't affect the atomic number and the particle is still an atom. Hypothetically, nd I'm not sure it's possible, alpha radiation would reduce the atomic number by 2, beta would reduce it by 1 and gamma doesn't reduce it at all anyway.

Yes, 1H (Hydrogen-1), the most common isotope of hydrogen has a single protons and no neutrons.

No, it is attractive. The strong nuclear force, as it is known, is what overcomes the coloumbic repulsion of the positively charged protons, which would otherwise tend to fly apart due to the electromagnetic force (like charges repulse).

When bound inside of a nucleus, the instability of a single neutron to beta decay is balanced against the instability that would be acquired by the nucleus as a whole if an additional proton were to participate in repulsive interactions with the other protons that are already present in the nucleus. As such, although free neutrons are unstable, bound neutrons are not necessarily so. The same reasoning explains why protons, which are stable in empty space, may transform into neutrons when bound inside of a nucleus.

A ground state is an outer orbital electron of an element that is at its lowest possible energy level. The electron in an excited state has a higher energy level than a ground state electron. The average distance from the nucleus is greater in the excited state than in the ground state.

Three types of nuclear radiation are alpha particles (consisting of two protons and two neutrons), beta particles (high-energy electrons or positrons), and gamma rays (high-energy electromagnetic radiation).

Atomic energy is used primarily for electricity generation in nuclear power plants. It is also used in medical applications such as cancer treatment and diagnostic imaging, as well as in industrial processes like food irradiation and sterilization. Research is ongoing to explore other potential uses, such as space exploration and propulsion.

The two designs built commercially in the US are the Pressurised Water Reactor (PWR) and the Boiling Water Reactor (BWR). Both these use ordinary water as moderator and coolant.

In Canada the Heavy Water Moderated design (Candu) has been built in numbers.

In France a large number of PWR's has been built.

In the UK, the gas cooled design was the main build for many years. These use a graphite moderator and CO2 coolant. The first series used natural uranium with a magnesium alloy fuel cladding, but the temperature level permitted with this type of fuel was fairly low. The Advanced Gas Cooled reactor used enriched UO2 fuel with stainless steel cladding which allowed higher gas temperature. These were fairly successful, but expensive to build. Any future reactors in the UK will be PWR or BWR.

It is possible to build a reactor which uses fuel in the form of large pebbles, with helium coolant, driving a gas turbine directly, without a steam circuit. Time may tell whether this is really a practical commercial design.

Another possible design is a reactor that uses fast neutrons. A power producing prototype was built in Scotland at Dounreay, but ultimately it was found that material problems made it too difficult to bring into commercial use.

Advantages of nuclear power in India include low carbon emissions, large energy generation capacity, and reduced dependence on fossil fuels. Disadvantages include high initial investment costs, long construction timelines, and concerns about safety and waste disposal.

If a helium cooled pebble-bed reactor driving a gas turbine can be made to work reliably, this has potential benefits through not requiring the normal water/steam circuits of a fossil fuelled or 'conventional' nuclear plant. This should make it more thermally efficient. However we wait to see a full scale prototype built and operated, until then it is premature to talk of its advantages over what is already well established, ie PWR's and BWR's.

It's a general term used to apply to the time following the advent of nuclear technology. It could have begun when the first controlled nuclear chain reaction took place, or when the first nuclear bomb was detonated. That was in the 1940's.

The B meson has a number of decay modes, called channels. The term "golden channel" is applied to the first one, and in that channel (decay chain or decay event), the B meson transforms into two other mesons, a J/psi meson and a K short, or KS meson, a kaon.

The alpha particle emitted in alpha decay will leave the nucleus of the atom with considerable kinetic energy. But it will begin slowing down immediately unless it's in a vacuum. This will be due to scattering events with any atoms or molecules it encounters along its path of travel. It will not experience an increase in velocity, so no, it won't speed up. A link to a related question can be found below.

Assuming ideal gas behavior, the volume of the tank can be calculated using the ideal gas law. The molar mass of nitrogen is 28.02 g/mol. First, convert 16.5 kg to grams and then to moles. Finally, use the ideal gas law PV = nRT to solve for volume at standard temperature (0°C) and pressure (1 atm).

Uranium undergoes fission, which produces heat. When the uranium is enriched, the process happens faster than in nature, and there is a lot of heat. The heat is used to boil water, and the steam is used to power a turbine, which drives a generator.

Radioactive elements make up a small fraction of all naturally occurring elements in Earth's crust. Most elements are stable and non-radioactive. However, even though they are a minority, radioactive elements play important roles in various scientific, medical, and industrial applications.

Simply put, radiation breaks chemical bonds, and this results in tissue damage. Broken bonds in the biochemical structures of cells can be repaired if they are not severe, but if chromosomes are damaged by the dissociation of the chemical bonds that hold them together, the cell can die. Radiation can also cause mutation. Lots of radiation can do lots of cellular damage, and can kill lots of cells, as you could have guessed. Additionally, the "messing up" of the DNA of a cell can trigger carcinoma, and cancer as a result of radiation exposure is entirely possible.