It really isn't elements that are stable or unstable, but isotopes. Carbon has both stable and unstable isotopes.
Naturally occurring nickel is made up of at least five stable isotopes.
Most elements - metals and non-metals - have both stable and radioactivie isotopes. If an element is a type of atom, an isotope is something like a "sub-type". Two isotopes of the same element have the same number of protons, but a different number of neutrons.Most elements - metals and non-metals - have both stable and radioactivie isotopes. If an element is a type of atom, an isotope is something like a "sub-type". Two isotopes of the same element have the same number of protons, but a different number of neutrons.Most elements - metals and non-metals - have both stable and radioactivie isotopes. If an element is a type of atom, an isotope is something like a "sub-type". Two isotopes of the same element have the same number of protons, but a different number of neutrons.Most elements - metals and non-metals - have both stable and radioactivie isotopes. If an element is a type of atom, an isotope is something like a "sub-type". Two isotopes of the same element have the same number of protons, but a different number of neutrons.
Hydrogen-1 and hydrogen-2 isotopes are radioactively stable.
Every atom of the same element is also categorized by its number of neutrons. An atom with a certain number of neutrons is an "isotope." Two atoms of the same element (same quantity of protons) can be different isotopes (different quantity of neutrons). Some isotopes are unstable, so most stable isotopes of an element are withing a range of a few numbers. For example, stable isotopes of carbon are Carbon-12 and Carbon-13.
copper has 2 stable isotopes
It has 10
Iron is an element, and there is only one element called iron (Fe). There are no iron element(s), but if you mean isotopes, then some iron isotopes are stable, and some aren't. No known element is stable in of it's isotopes.
hydrogen
Dubnium is an artificial chemical element and hasn't stable isotopes.
Element 20 is Tin. Element 38 is Strontium. Element 56 is is Barium. Element 100 Fermium. Fermium is artificially created, and has no stable isotopes. In general, there are no stable isotopes heavier than Bismuth (element 83).
Tin or Stannum with 10 stable isotopes
Einsteinium is a real element. It has no stable isotopes.
It really isn't elements that are stable or unstable, but isotopes. Carbon has both stable and unstable isotopes.
There are 8 isotopes of mercury but there are only 7 stable isotopes: 196, 198, 199, 200, 201, 202 and 204.
Elements with no stable isotopes include technetium (element 43) and promethium (element 61) and all elements heavier than lead (elements 83 and higher). Bismuth, element 83, is virtually stable with an extremely long half life of 1.9 x 1019 years.
All the isotopes of californium are radioactive, artificial and unstable.