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Radioactive Decay

Also known as nuclear decay, radioactive decay is the decrease of radiation through time.

540 Questions

What is the radioactive decay law?

The rate of decay (activity) of a radioactive isotope is proportional to the number of atoms of the isotope present.

What is the difference between a nuclear decay from a chemical reaction?

Nuclear decay involves the contents of the atomic nucleus, the protons and neutrons. Chemical reactions involve the electrons.

Can you give a sentence with carbon dating?

Carbon dating is a method of telling approximately how old an ancient object is. Here are some sentences.

  • The scientists used carbon dating and decided that the mummy was 10,000 years old.
  • Carbon dating is not perfect, but it can give you a rough idea.
  • We studied carbon dating in class today.

How does radioactive decay produce new elements?

In alpha decay, the nucleus loses two protons and two neutrons. The resulting element will therefore have an element number that is two less.In beta minus decay, a neutron gets converted to a proton. The resulting element will have one more proton - the element number will be one more.

In beta plus decay, a proton gets converted to a neutron. The resulting element will have one less proton - the element number will be one less.

How many minute will it take for 1gram of francium isotope to decay to 0.125gram?

Each isotope has another half life.
For the isotope francium-223 (half life = 21,8 minutes) the time is 87,2 minutes.

How is the radioactive decay of Krypton different from the radioactive decay of Americium?

The radioactive decay of americium 241 is by alpha disintegration; the disintegration of radioactive krypton isotopes is by beta particles emission.

What best definition radioactive decay?

The process by which the nucleus of an unstable atom loses energy by emitting radiation, including alpha particles, beta particles, gamma rays, and conversion electrons.

If carbon dating is inaccurate on marine animals how can you trust it for the marine animals in strata such as the Cambrian rock?

Perhaps you can't, but carbon dating is not used on mineralized fossils. The igneous rock above and below the fossil strata is radiometricly dated, Carbon dating is only good on material containing carbon; material less than 40,000 years old.

When an atom undergoes radioactive decay does it become a different element?

That depends on the type of decay, alpha and beta decay change the atom into a different element but gamma decay does not.

How do scientists use the halflife of radioactive isotopes to date rocks and fossils?

The basic idea is to compare the abundance of a naturally occurring radioactive isotope within a material to the abundance of its decay products; it is known how fast the radioactive isotope decays.

Particles or waves given off by atoms undergoing nuclear decay produce?

Produce a large amount of heat and energy which is utilized for many purposes

How or where is gamma radiation formed?

In the atomic nucleus as protons and/or neutrons fall from excited states towards their ground state.

Is fusion nuclear decay or nuclear synthesis?

Fusion is nuclear synthesis, combining atoms of lesser mass into atoms of greater mass. Decay is reducing the mass of larger (unstable) atoms to form atoms of lesser mass.

In what type of nuclear decay does an element lose a neutron and emit an electron and gain a proton?

This type of decay is called β- (beta minus) decay. A link is provided to a related question with a descriptive answer that details the process.

What kind of dating do you do in the lab?

For example, radioactive dating.Also, two people who work in a lab (typically a man and a woman) could have a date.

What is the nuclear decay for francium?

Francium-223 decay to radium-223; each isotope have another type of decay.

What are the elements of alpha decay?

Alpha particle is composed of two protons and two neutrons (equivalent to He nucleus). So the parent decaying by alpha decay results in a daughter having atomic number less by two and mass number less by four.