Some isotopes are stable, others are unstable.
No. They are not. They undergo nuclear decay at a specific rate for each different isotope.
unstable isotopes have live time measured in "half lives long", stable isotopes don't have it
That simply means that they don't decay radioactively.
Isotopes are very stable.
All the isotopes of americium are radioactive and unstable.
Two stable ones, 10 & 11. Several unstable.
All the isotopes of californium are radioactive, artificial and unstable.
All the isotopes of nobelium are radioactive and unstable.
Natural isotopes of silicon are: 28Si - 92,23 % (stable) 29Si - 4,67 % (stable) 30Si - 3,1% (stable) 31Si - traces (radioactive, unstable) 32Si - traces (radioactive, unstable)
It really isn't elements that are stable or unstable, but isotopes. Carbon has both stable and unstable isotopes.
Hydrogen has 1 unstable isotope, and 2 stable isotopes.
All the isotopes of americium are radioactive and unstable.
It has mostly stable isotopes.
If you mean oxygen: like most elements, it has both stable isotopes, and unstable (i.e., radioactive) isotopes. 16O, 17O and 18O are stable; the unstable (radioactive) isotopes include 15O and 14O.
Two stable ones, 10 & 11. Several unstable.
Technetium has no stable isotopes.
All the isotopes of californium are radioactive, artificial and unstable.
Xenon has eight stable naturally occuring isotopes. Besides these stable forms, there are over 40 unstable isotopes that have been studied.
All the isotopes of nobelium are radioactive and unstable.
The isotopes protium (H-1) and deuterium (H-2) are stable; tritium (H-3) and artificial isotopes are unstable.
Natural isotopes of silicon are: 28Si - 92,23 % (stable) 29Si - 4,67 % (stable) 30Si - 3,1% (stable) 31Si - traces (radioactive, unstable) 32Si - traces (radioactive, unstable)