copper has 2 stable isotopes
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.
It has 10
Dubnium is an artificial chemical element and hasn't stable isotopes.
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Copper has natural isotopes of 63,67. And other isotopes are known at least from 58 through 70. But these are unstable.
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If you are talking about stable isotopes then there are two, 63Cu and 65Cu.
There are 8 isotopes of mercury but there are only 7 stable isotopes: 196, 198, 199, 200, 201, 202 and 204.
All the isotopes of californium are radioactive, artificial and unstable.
That depends on the isotope, as Argon has three different stable isotopes and many different radioactive isotopes.
From 0 to 3 isotopes per element are stable.
Tin has various isotopes, with 10 stable isotopes. The most abundant isotopes are tin-120 and tin-118, both with 70 neutrons.