Carbon 12 and Carbon 13 are stable. All other isotopes of carbon are unstable and radioactive
Carbon-12 99% and Carbon-13 1%
potassium
leada 82
The atomic mass of the most stable isotope of Roentgenium is 281. This most stable isotope decays in around 36seconds. Oddly, it's most stable isotope has the same atomic mass as the most stable isotope of the element before: Darmstadtium.
The most stable isotope of radon is 222Rn.
Arsenic has only one stable isotope 75As
The most common plutonium isotope is plutonium 239.
The most stable isotope is 285Cn, which has a half life of 30 seconds. The least stable isotope is 277Cn, which has a half life of 0.7 milliseconds.
The atomic mass of the most stable isotope of Roentgenium is 281. This most stable isotope decays in around 36seconds. Oddly, it's most stable isotope has the same atomic mass as the most stable isotope of the element before: Darmstadtium.
Tritium is not the most stable isotope known.
The most stable isotope of radon is 222Rn.
Arsenic has only one stable isotope 75As
The most common plutonium isotope is plutonium 239.
52Cr is a stable Chromium isotope. 52Cr is the most commun natural Chromium isotope.
The most stable isotope is 285Cn, which has a half life of 30 seconds. The least stable isotope is 277Cn, which has a half life of 0.7 milliseconds.
27, for its most stable isotope
it must eject the extra nucleons and should be conveted into a stable isotope.
1 neutron in He-3 isotope. 2 neutrons in He-4 isotope (most stable)
22 neutrons, for its most stable isotope.
Possibly, the most common and stable isotope of Nitrogen.