All elements 83 and above are radioactive.
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All atoms of chemical elements contain protons, neutrons and electrons.
That is not true. Every element takes the form of a gas if it is sufficiently heated. In other words, all elements have some boiling point. For some elements the boiling point is very high, but it does exist.
Yes, they are true chemical elements but man made.
all cells contain the same key elements, such as carbon, nitrogen, and oxygen.
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.
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Radioactive elements include all elements whose nuclei either:contain protons more than 83 proton, orcontain neutron to proton ratio out of the stability ratio.refer to related question below.
It is false.
Yes
True
All atoms of chemical elements contain protons, neutrons and electrons.
It is true, all are solids.
All isotopes of all elements with atomic number similar or greater than 84 are radioactive, and don't have stable nuclei.
is false
true
All elements with atomic numbers greater than 83 are radioactive. All the nuclei of these elements are blown apart because of their enormous positive charges.