What is the half-life of sodium-24 explain your answer?

Figure 7: Decay scheme of a radioactive sodium-24 (24Na) nucleus. With a half-life of 15 hours, it decays by beta decay to an excited magnesium-24 (24Mg) nucleus. Two gamma rays are rapidly emitted and the excitation energy is carried off, whereby the stable ground state of magnesium-24 is reached.

How do you find the half-life of sodium-24?

Notice that the time period between each of the yellow crosses is 15 hours. This tells us that the count rate of Sodium-24 halves every 15 hours. In other words, the activity of Sodium-24 is halved every 15 hours. We can summarise this by saying that Sodium-24 has a half-life of 15 hours.

What is the half-life of Na 25?

The half-life of sodium-25 is 1 minute.

How do you calculate half-life?

The time taken for half of the original population of radioactive atoms to decay is called the half-life. This relationship between half-life, the time period, t1/2, and the decay constant λ is given by t12=0.693λ t 1 2 = 0.693 λ .

What’s the atomic number of sodium-24?

Element Name Sodium
Element Symbol Na
Atomic Number 11
What is the half-life of sodium 22?

use of sodium Of the radioactive artificial isotopes, sodium-22 (2.6-year half-life, the longest half-life of a sodium isotope) is used as a radioactive tracer for natural sodium.

Is sodium 24 stable?

Sodium-24 is a stable isotope containing 11 neutrons. Only trace amounts of sodium-24 are found naturally. Sodium-24 is a radioactive isotope which decays into 24Mg by β- decay. Its half-life is 14.96 hours.

What type of particle does sodium 24 emit when it radioactively decays?

Sodium-24 undergoes beta decay, or, more specifically, beta-minus decay. During a beta decay, a neutron located in the nucleus of a radioactive nuclide is converted to a proton. At the same time, the nuclide emits an electron, also called a beta particle, and an electron antineutrino, ¯νe .

What is the difference between sodium 23 and sodium 24?

The atoms of both isotopes contain 11 protons, but sodium-23 has 12 neutrons whereas sodium-24 has 13. Sodium-23 is quite stable (for example, it is one of the elements in common salt – NaCl, sodium chloride). Sodium-24, however, is not stable.

What is sodium 24 used for?

Sodium 24 is used as an electrolyte tracer to follow the path sodium takes in a person’s body to see if their uptake levels are within normal ranges, while sodium 22 is used in nuclear medicine imaging for positron emission tomography. Sodium -24 can also be used in non-medical applications.

What is the original mass of sodium 24?

Nuclide Z Isotopic mass (Da)
Excitation energy
23Na 11 22.9897692820(19)
24Na 11 23.990963011(18)
24mNa 472.207(9) keV
How do you explain Half-Life?

Half-life (symbol t1⁄2) is the time required for a quantity to reduce to half of its initial value. The term is commonly used in nuclear physics to describe how quickly unstable atoms undergo radioactive decay or how long stable atoms survive.

Who discovered sodium 24?

Sodium was discovered in 1807 by the English chemist Humphry Davy from electrolysis of caustic soda (NaOH). Although sodium is the sixth most abundant element on earth and comprises about 2.6% of the earth’s crust, it is a very reactive element and is never found free in nature.

How many electrons does sodium 24 have?

Mass number This tells us that sodium has 11 protons and because it is neutral it has 11 electrons.

What is the half-life of manganese 54?

abundance half-life (t1/2)
54Mn syn 312 d
55Mn 100% stable
What is the half-life of BA 140?

BARIUM-140, one of the γ-ray emitting isotopes in fallout, has a physical half-life of 12.8 days.

Is sodium 35 radioactive?

About Sodium Chloride-35Cl Isotope Sodium Chloride-35Cl is a form of sodium chloride containing a stable (non-radioactive) isotope of chlorine.

What is the half-life of sodium 23?

Mass NumberHalf-lifeDecay Mode23STABLE-2414.997 hoursBeta-minus Decay24m20.18 millisecondsIsomeric TransitionBeta-minus Decay

How does sodium 24 detect leaks?

Leaks in underground pipelines can be detected by the injection of a radioactive isotope. This is achieved by adding a small amount of a radioisotope which is a source of beta radiation to the fluid. … Sodium 24 is an example of a radioisotope used in leak detection.

What is sodium worth?


What is the disintegration energy for the β − decay of NA 24?

Na-24 decays 100% by beta minus emission. The main transition (99.939%) has a maximum energy of 1393 keV and populates the 4123 keV level of Mg-24.

What nuclides are most likely to decay by beta decay?

Pt-200 is most likely to undergo beta-minus decay.

What happens if sodium 23 undergoes beta decay?

Note that, in β⁻ decay, the product has the same mass number but an atomic number that has increased by 1. Neon-23 decays by β⁻ decay to sodium-23 with a half-life of about 37 s. The symbol for a β⁺ particle is 01e . The element with Z = 12 is Mg.

What is a half-life in math?

Definition and Formula Half-life is defined as the amount of time it takes a given quantity to decrease to half of its initial value. … The half-life of carbon-14 is approximately 5,730 years, and it can be reliably used to measure dates up to around 50,000 years ago.

Which field is the sodium most useful?

Sodium is used as a heat exchanger in some nuclear reactors, and as a reagent in the chemicals industry. But sodium salts have more uses than the metal itself. The most common compound of sodium is sodium chloride (common salt). It is added to food and used to de-ice roads in winter.

Can an element be broken down?

Note that an element: consists of only one kind of atom, cannot be broken down into a simpler type of matter by either physical or chemical means, and. can exist as either atoms (e.g. argon) or molecules (e.g., nitrogen).

What is the half-life of iodine 125?

Iodine-125 is a commonly used radionuclide with a half-life of 60 days, emitting gamma rays with a maximum energy of 0.035 MeV (Million Electron Volts).

What is the medical use of calcium 47?

Uses. Calcium-47 is used in medicine to investigate bone metabolism problems or to diagnose calcium disorders. It is also used in the biomedical research of animals to study the cellular body function and the formation of bones in mammals.

Does potassium have radiation?

Potassium (K) is a widely encountered element with a very small fraction of its atoms, about 0.012%, being radioactive. These K-40 atoms spontaneously decay, releasing electrons (beta radiation) as well as gamma rays.

Can sodium be a liquid?

Liquid sodium metal Elemental sodium (Na) is a liquid metal like mercury and solder. Sodium metal is used as a low-pressure coolant.

What is half-life of a radioisotope?

Radioactive half-life is the time required for a quantity of a radioisotope to decay by half. … If the half-life of an isotope is relatively long, e.g. 80 years, it will take a long time for significant decay to occur.

How long did it take for 100 mg of p 32 to decay until only 50 mg remain unchanged days?

After 14 days, half of the original amount of phosphorus-32 has decayed, so only half remains. After another 14 days, half of the remaining amount (or a quarter of the original amount) is still left, and so on. Q: What fraction of the original amount of phosphorus-32 remains after three half-lives?