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Radioactive elements comprise a majority?
Yes. Stable elements are 83 elements. all elements above that of atomic number 83 (Bismuth) are radioactive. Radioactive isotopes are of the order of 1500 radioactive isotope.
What element continue to decay until they finally become stable?
All elements above the atomic number of 83 are radioactive, but two elements that are under it are also radioactive. They are technetium (atomic number 43) and promethium (atomic number 61). Radioactive elements are elements that decay until stable. =)
Do radioactive elements differ in atomic number?
yes
What are the ten elements in thre periodic table that are radioactive?
all elements after uranium (atomic number 92) are radioactive.
How is it possible for an element to decay forward in the periodic table that is to decay to an element of higher atomic number?
When elements form other elements of a higher atomic number, the process by which that happens is called nuclear fusion, not radioactive decay, and it normally happens only inside stars.
All isotopes of this element are radioactive?
Radioactive Elements (38) These elements are radioactive. They either have no stable naturally occurring isotope, or else are entirely artificial (all artificial elements have no stable isotopes). by Andrew Moore
What are the radioactive elements with atomic number from 90 to 103 called?
The Actinides.
How are the elements with atomic numbers 43 and 61 are unique?
The element with atomic numbers 43 (Technetium) and 61 (Promethium) are unique because they are the only radioactive elements before the start of the bulk of the radioactive elements. The bulk of the radioactive elements begins at atomic number 84 (Polonium). These are significant as they aren't primordial and are only found due to radioactive decay.
Why does the periodic table has over 110 elements when only 90 occur on earth?
The higher atomic number elements are radioactive and have long since decayed away (assuming they were here to start with).
Which alkaline earth metal is radioactive?
Radium. Elements with an atomic number greater than 83 are always radioactive.
Which elements in the peridoic table are radioactive elements?
All elements from atomic number 84 (Polonium - Po) and onwards are radioactive, although ones that have not been observed cannot be confirmed.
What are the radioactive elements with atomic number from 90 to 103 in the periodic table called?
Actinide Series.
