WHY are synthetic elements above atomic number 83 radioactive?

Answer 1

because the electronegative force holding the nucleus together is too weak and the atom demanding stability is willing to part with certain particles in order to remain stable. thus gives rise to the alpha beta and gamma rays which are in essence radioactivity. radioactivity is nothing but a release of molecular energy which leads to atomic stability therefore making the atom "happy."

Answer 2

There are two forces in the nucleus of an atom that are always competition. There is the strong which tends to pull both neutrons and protons together. However the strong decays very rapidly, at distances longer than several proton diameters is goes to zero. This is the glue that holds the nucleus together. Then there is the electromagnetic force, which cause protons to repel. So the electromagnetic force is trying to tear the nucleus apart.

As I hinted at above, in larger atoms the strong nuclear force can not travel all the way across the nucleus. So there comes a point when adding more neutrons will not stabilize the atom any further.

Answer 3

above answers are correct but I would add that there is a theoretically stable element up around 184. We have not yet been ab le to make it, though. And all the man made elements (transuranic) are 93 and up not 83. Some radioactive elements occur naturally.

Answer 4

the respond is unquestionably 80 3. "All nuclei that have an atomic quantity greater effective than 80 3 are reactive." Above atomic quantity ninety two are transuranium factors that are all radioactive yet in addition all guy-made.

Answer 5

Because they have more neutrons than protons in the neculeous of the atom, this is more than the nuclear strong force can handle and they decay into smaller elements.

Answer 6

Because their nucleus is too heavy to be steady.

Answer 7

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