Answer:
a) is correct.......,.....
Radiation
hope that helped!
In order of relative atomic mass.
Answer:
Different isotopes of the same element have the same number of protons in their atomic nuclei but differing numbers of neutrons. Radioisotopes are radioactive isotopes of an element. They can also be defined as atoms that contain an unstable combination of neutrons and protons, or excess energy in their nucleus.
It would be an physical change ; if you melt butter the butter goes from a solid to a liquid so therefore the physical state is changed.
