Why even even nuclei are more stable?
Why even even nuclei are more stable?
Nuclides containing even numbers of both protons and neutrons are most stable and this means less radioactive. than nuclides containing even numbers of protons and odd numbers of neutrons. In general, nuclear stability is greater for nuclides containing even numbers of protons and neutrons or both.
What material has the longest half life?
Bismuth-209
What is the half life and decay mode of RN 222?
3.82 days
What is the half life of tellurium 128?
9.35 h
Is a longer half-life more dangerous?
A short half-life is more dangerous. A long half-life stays dangerous longer. Well, but there are exceptions. To make a really reasonable assessment of the risk posed by radioactive material, you have to know not only the half-life but the decay products, which may also be radioactive or could be toxic.
Which half-life is more dangerous?
…of which the longest-lived is strontium-90 (28.9-year half-life). This isotope, formed by nuclear explosions, is considered the most dangerous constituent of fallout.
What does a longer half-life mean?
Drugs with longer half-lives remain the bloodstream for longer, helping to keep cravings and withdrawal symptoms to a minimum with fewer doses given less often. These medications can then be tapered down until dependence and addiction are managed, and physical dependence is stabilized.
Is a radioisotope with a short or long half-life more dangerous?
Isotopes with a long half-life decay very slowly, and so produce fewer radioactive decays per second; their intensity is less. Istopes with shorter half-lives are more intense. In nuclear waste, isotopes with very short half-lives, say a few days or even a few weeks, are not the major concern.
What is the half-life of radioactive nuclei?
Half-life, in radioactivity, the interval of time required for one-half of the atomic nuclei of a radioactive sample to decay (change spontaneously into other nuclear species by emitting particles and energy), or, equivalently, the time interval required for the number of disintegrations per second of a radioactive …
What is a 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.
What is the half-life of a radioisotope If a 40g sample becomes 10g after 20 minutes?
What is the half-life of a radioisotope if a 40 g sample becomes 10 g after 20 minutes? 10 minutes.