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How many stable isotopes are in the element californium?
All the isotopes of californium are radioactive, artificial and unstable.
How many radioactive isotopes does gold have?
2
Hydrogen has how many unstable isotopes?
Hydrogen has 1 unstable isotope, and 2 stable isotopes.
All isotopes radioactive?
No, there are many stable isotopes.
What is the radioactivity for lead?
The main lead isotopes 206Pb, 207Pb and 208Pb, are not radioactive. It does have traces of radioactive isotopes, but the quantity is so small that lead's radioactivity can be considered zero. It is however toxic if ingested.
Are all transition elements are radioactive?
Not all of the transition elements are radioactive. Many of them are, and some of them have common radioactive isotopes, but some of them have no naturally occurring radioactive isotopes. Please note that all elements have synthetic radioactive isotopes, at least.
Why is an isotope unstable?
A lot of the natural occurring isotopes are stable, such as those of smaller elements. The bigger an atom is, the more unstable its isotopes may be (not an absolute rule, though). It is harder to keep the many nuclear parts (protons and neutrons) together if they are so numerous as in heavy elements.
When does Uranium-235 become unstable?
Uranium 235 is unstable because it is a radioactive isotope. This means that it is constantly decaying and emitting radiation. The reason it is unstable is because it has too many neutrons in its nucleus. The neutron is a unstable particle, and when there are too many of them in one place, they can cause problems. When uranium 235 decays, it emits alpha particles, which are high-energy particles that can damage DNA and cause cancer.
How many radioactive isotopes are known?
Today are known approx. 3 000 radioactive isotopes, natural or artificial.
How many radioactive isotopes does uranium have?
All of them.
How many isotopes does chromium have?
Chromium has 25 known isotopes, 2 isomers, 3 of which are non-radioactive.
How many isotopes does copper have?
Copper has natural isotopes of 63,67. And other isotopes are known at least from 58 through 70. But these are unstable.
