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What is the range of half-lives of different radioactive element?
It would be quite difficult to list all radioactive elements and their half lives in this area. Lithium 5 has a half life of about a trillionth of a second. Uranium 238 has a half life of about 4.7 billion years. Since the world is about 4.2 billion years, over half the Uranium 238 is still around. The first element in the Periodic Table, Hydrogen, has a radioactive form, Hydrogen 3. It has a half life of about Twelve and a half years. Helium has a radioactive form, Helium 5. It's half life is a trillionth of a second. Then you get to elements with different radioactive isotopes. You will need to look them up in a handbook. Tin is the element with the most isotopes.
What is the source of the radioactive nuclei present in spent rods?
The nuclear fission process produces a range of lighter elements as fission products, and many of these are radioactive.
Do all isotopes have the same half lives?
Yes, all elements have at least one radioactive isotope. Hydrogen has two isotopes, Deuterium and Tritium. H3 has a half life of 12.3 years. Not all isotopes are radioactive. About half way up the atomic mass table, Tin appears to have the greatest number of stable isotopes - ten out of about 124 isotopes in all.
Which elements emit radiation in the visible part of the spectrum?
Radioactive elements such as radium or uranium emit radiation. There are three types of "radiation"; alpha particles (which are solitary electrons), beta particles (helium nuclei, consisting of two protons and two neutrons) and "gamma radiation", which is high-energy electromagnetic energy similar to light or X-rays.
How long does it take a radioactive atom to decay?
The time it takes for a radioactive atom to decay can vary significantly depending on the specific isotope. This is measured in terms of a half-life, which is the time it takes for half of the radioactive atoms in a sample to decay. Half-lives can range from fractions of a second to billions of years.
Why do some elements not have relative atomic masses eg. radium?
All the elements has an atomic weight; sometimes for the unstable radioactive elements is indicated only the value of the atomic mass of the most stable isotope.The term atomic weight is used for elements and the term atomic mass for isotopes (after the rules and the tradition of IUPAC).
What are the radio active rare-earth metals located at the bottom of periodic table?
actinide: 15 metallic chemical elements with atomic numbers from 89 to 103 Actinium, Thorium, Protactinium, Uranium, Neptunium, Plutonium, Americium, Curium, Berkelium, Californium, Einsteinium, Fermium, Mendelevium, Nobelium, Lawrencium
What do the first 82 elements in the periodic table have in common?
The first 82 elements in the periodic table are all naturally occurring elements. They range from hydrogen to lead and have unique chemical properties based on their atomic structure and electron configurations. These elements form the building blocks of all matter in the universe.
What is a radioactive decay of the spent fuel?
Radioactive decay of spent fuel refers to the process where the radioactive isotopes in the fuel break down and release radiation and particles. This decay can continue for thousands of years, making spent fuel a long-term radiation hazard. Proper storage and disposal methods are necessary to prevent environmental and health risks.
When can light elements be predicted to have stable nuclei?
Light elements (such as hydrogen, helium, and lithium) are predicted to have stable nuclei when the ratio of neutrons to protons falls within a certain range. This range is known as the "valley of stability" on the nuclear binding energy curve. Nuclei that lie within this valley are less likely to undergo radioactive decay.
What is the half life of man made elements?
Half-life refers to nuclear isotopes. Each isotope, whether naturally ocurring or man-made, has a different half-life. You must say which element that is emitting radiationyou are asking about.
How would you use domain and range to determine whether a relation is a function?
Each element in the domain must be mapped to one and only one element in the range. If that condition is satisfied then the mapping (or relationship) is a function. Different elements in the domain can be mapped to the same element in the range. Some elements in the range may not have any elements from the domain mapped to them. These do not matter for the mapping to be a function. They do matter in terms of the function having an inverse, but that is an entirely different matter. As an illustration, consider the mapping from the domain [-10, 10] to the range [-10, 100] with the mapping defined by y = x2.
