copper has 2 stable isotopes
It has 10
Dubnium is an artificial chemical element and hasn't stable isotopes.
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stableAnswer:Like many elements copper has many isotopes. Two of these are stable (63Cu and 65Cu) others are radioactive. The isotope with the longest half life is 67Cu with a half-life of almost 62 hours.
All the isotopes of californium are radioactive, artificial and unstable.
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There are 8 isotopes of mercury but there are only 7 stable isotopes: 196, 198, 199, 200, 201, 202 and 204.
If you are talking about stable isotopes then there are two, 63Cu and 65Cu.
That depends on the isotope, as Argon has three different stable isotopes and many different radioactive isotopes.
Copper has natural isotopes of 63,67. And other isotopes are known at least from 58 through 70. But these are unstable.
From 0 to 3 isotopes per element are stable.
1. Sodium has 20 isotopes and 2 isomers. 2. Only the isotope 23Na is stable. 3. The stable isotope 23Na and the radioactive isotopes 22Na and 24Na (these isotopes exist in traces) are natural isotopes.