0
The atoms that are radioactive are those with unstable nuclei. There is no easy way to tell which is which, so the isotope has to be looked up.
All elements have at least some radioactive isotopes. There are 36 elements for which all radioactive isotopes are synthetic or fission products, so for practical purposes, there are no radioactive isotopes of them in nature, except where introduced by human activity. They include most of the common elements we find in nature, but not all.
There are 44 elements that are found as stable isotopes, but at least traces of radioactive isotopes are found in nature. Among these are hydrogen, carbon, sodium,
silicon, chlorine, and potassium, all of which are necessary for life. Radioactive potassium, in particular, is present as 0.012% of all potassium.
For another group of elements, including technetium, promethium, and all with atomic numbers of 83 (bismuth) or more, there is no isotope that is stable.
Wiki User
∙ 13y ago
Wiki User
∙ 14y agoAll elements after lead (Pb) on the Periodic Table are radioactive. Isotopes of lighter elements (C-14 for example) can be radioactive as well. And, in fact, all elements have radioactive isotopes.
Wiki User
∙ 11y agoActinides
Add your answer:
Earn +20 pts
What characterizes a radioactive element?
As radioactive element is an element that is on the Priodic Table of Elements. A Radioactive Element is usually radioactive.
What types of elements are useful for dating materials?
Radioactive elements are used to date the age of rocks. Radioactive elements decay according to a known pattern. Scientists can use the elements of that pattern to determine when the rock with the original radioactive element was formed.
What element is the most radioactive lithium sodium or potassium?
All the three elements are generally non-radioactive.
Which element is a stable element?
A stable element is any non-radioactive element. All elements before element atomic number 84 (not including 84) - Polonium (Po) are stable elements.
What is radioactive element in chemistry?
Actimium, plutonium, radon, radium, thorium, uranium
What characterizes a radioactive element?
As radioactive element is an element that is on the Priodic Table of Elements. A Radioactive Element is usually radioactive.
Can one element change into a different element?
Yes, but only if it is radioactive. Radioactive elements change into different elements through radioactive decay.
What element family have no radioactive elements?
Radioactive elements exist in all groups of the periodic table.
Which element is radioactive and synthetic?
All transuranic elements are synthetic and radioactive.
Which radioactive element used in AIDS treatment?
Radioactive elements are not used in the treatment of AIDS.
What is unique about element 89-112?
Elements 89-112 are radioactive elements.
Are all elements periodically change to become new element s?
No. Only radioactive elements, which undergo radioactive decay can change to different elements.
What elements are radioactive?
Answerelements with a nonstable isotope or at least one naturally occurring isotope that is radioactive. AnswerAll elements have radioactive isotopes.There are a lot of radioactive elements: Technetium, Promethium, Polonium, Astatine, Radon, Francium...Here is the whole list: http://periodictable.com/Elements/Radioactive
What is unknown radioactive elements?
A radioactive element is the element which radiates continuously giving alpha, beta, and gamma rays. The elements having atomic no. more than 82 are mostly considered as radioactive elements. These elements emit radiations by themselves even if if they are not get touched. They are discovered by Maria Curie and Pierre Curie in 1907
What types of elements are useful for dating materials?
Radioactive elements are used to date the age of rocks. Radioactive elements decay according to a known pattern. Scientists can use the elements of that pattern to determine when the rock with the original radioactive element was formed.
Is mendelevium poisonous to plants animals or humans?
Mendelevium is a radioactive element. Generally radioactive elements are dangerous.
What element is the most radioactive lithium sodium or potassium?
All the three elements are generally non-radioactive.
