The minimum amount of unstable atoms needed to produce an uncontrolled chain reaction is called critical mass.
radioisotopes
The number of protons equal the atomic number; the electrons from the outer shell are involved in chemical reactions. The ionization energy and the electronegativity are also important characteristics of atoms. Atoms with a big mass become unstable etc.
Increasing the ratio neutrons/protons in the nucleus the atom become unstable.
No. If they did, they would be radioactive and unstable.
Unstable atoms are said to be radioactive
Ionizing radiation is produced by unstable atoms. Unstable atoms differ from stable atoms because they have an excess of energy or mass or both.
Fusion is nuclear synthesis, combining atoms of lesser mass into atoms of greater mass. Decay is reducing the mass of larger (unstable) atoms to form atoms of lesser mass.
The minimum amount of unstable atoms needed to produce an uncontrolled chain reaction is called critical mass.
unstable atoms
Unstable Isotopes will degrade through radioactive decay into other types of atoms. To break it down Unstable isotopes are those whose moleules break down to form new atoms and ions.
radioisotopes
The number of protons equal the atomic number; the electrons from the outer shell are involved in chemical reactions. The ionization energy and the electronegativity are also important characteristics of atoms. Atoms with a big mass become unstable etc.
All atoms are nuclear, in that they all have nuclei. Some atoms have unstable nuclei, making them radioactive. I'm afraid I have no idea what you mean by "nuclear atoms," unless you meant to say radioactive atoms, in which case the answer is "they have unstable nuclei and they're radioactive."
The minimum amount of unstable atoms needed to produce an uncontrolled chain reaction is called?
Increasing the ratio neutrons/protons in the nucleus the atom become unstable.
radioactive decay