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Isotopes
Isotopes are atoms that have different number of neutrons, so they have a different mass number than the other atoms in an element.
1,075 Questions
How many photons are required to ionize atomic hydrogen?
Ionization energy and electron affinity for cations and anions, respectively.
What is argons most common isotope?
Ar 40 is the most common isotope, accounting for 99.6% of the total (by weight).
What is the stable nucleus produced at the end of the decay steps in a uranium decay series?
Thorium, radium, radon, polonium, thallium, etc.
How is a radioactive isotope different from a stable isotope?
The radioactive isotope is disintegrated in time and emit radiations.
What will always be different in the isotopes atoms?
The number of Neutrons in an isotope will always be different.
Why can't two atoms with the same mass number be isotopes of each other?
The number of protons must be the same.
What is technetium 99 half life?
The half life of technetium-99 is 2,111.10e+5 years.
Avoid a confusion between Tc-99 and Tc-99m.
What is the nuclear symbol for an isotope of gallium?
The one you are thinking of is probably the trefoil symbol, three black foils on a yellow background. See link below
What are the two most common isotopes used as nuclear fuels?
- in reactors: yellowcake, a uranium oxide; after that probably metallic uranium
- in stars: ordinary hydrogen; after that helium
Method of dating very old rocks by means of the amount of common lead they contain. Common lead is any lead from a rock or mineral that contains a large amount of lead and a small amount of the radioactive precursors of lead (i.e., the isotopes uranium-235, uranium-238, and thorium-232). By this method, the age of the Earth has been estimated to be c. 4.6 billion years. This figure is in good agreement with the age of meteorites and the age of the Moon as determined independently.
Radiometric dating is used to date rocks (like at the grand canyon) to approximately see how old the earth is. it is inaccurate though. the rocks actually decay faster than they are supposed to. for example: if we take one rock and see how old it is using radiometric dating for one year, it might say it is 10,000 years old. hope it helps!
Radiometric dating is the principal source of information about the absolute age of rocks and other geological features, including the age of the Earth itself, and can be used to date a wide range of natural and man-made materials.
Is radioactive isotopes used to treat cancer.?
Yes, radioactive isotopes are largely used for the treatment of cancer.
Isotopes of a given element have what?
An isotope has same number of protons but a different number of neutrons as the original element in the atomic nucleus; it has the same atomic number as the element which isn't an isotope, but will have a different mass number.
-atomic number
During some radioactive explosion/exposure the atoms combine and if they stay stable they from with extra amounts of protons. Isotopes are when two or more elements have the same number of protons, but different number of neutrons.
Do isomers of the same molecule have identical chemical properties?
When two molecules have different configurations but the same atomic composition the two molecules cannot be said to have the same physio-chemical properties. In fact, a simple rearrangement, even with identical chemical formulas, can drastically change the properties of a substance.
Does neon have any isotopes and why?
Neon isotopes can be used in dating meteoric rock and to investigate the creation of some isotopes in space.
Name two ways that isotopes of an element differ?
The two fundamental differences between two isotopes are its mass and its spin. This is because there is a difference in the number of neutrons in the atom, and neutrons have a both mass and spin (1.67493x10-27kg and 1/2, respectively).
This, in turn, causes a handful of changes, including stability, appearance in nuclear magnetic resonance spectra, frequency of intranuclear vibrations, and radioactivity.
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.
How many electrons are in Magnesium-25?
Magnesium has an atomic number of 12, so there are 12 protons in any atom of this element. The number of protons do not change if it is an isotope of an element.
Radium has 7 "shells" and has 88 protons and 138 neutrons. it also has 88 electrons.
the electrons are arranged like:
2 (1st shell)
8(2nd)
18(3rd)
32(4th)
18(5th)
8(6th)
2(7th)
What is the difference in the isotopes c-12 and c-13?
12C is a carbon atom with 6 neutrons, 13C has 7 neutrons. Each isotope contains 6 protons, so 6+6=12 and 6+7=13.
How are isotopes and ions and elements produced?
You add or remove one or more neutrons from each atom.
