Radioactive
Stable
Isobars
Isotopes
U-235
U-236
U-238
U-239
Electrons
Gas
Vapour
Plasma
Radioactivity
Energy of gamma rays
Intensity of gamma rays
Half-life
Electromagnetic waves
Helium nucleus
Fast moving electron
Single ionized gas atom
Binding energy
Packing fraction
Ionization energy
Excitation energy
Attractive or repulsive depending upon separation between nucleons
Neither attractive nor repulsive
Attractive only
Repulsive only
Controlled nuclear fission
Nuclear fusion
Nuclear fission
None of the above
Temperature
Conducting nuclear fission
Conducting thermonuclear fission
Producing X-rays
Proton
Neutron
Meson
Electron
