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.
I am not sure plz show me the question
Answer:
actually answer should be helium
3 is C i believe, and as for 4 minerals are solid, natural.. that's about all I can say...
Weathering would be chemical because it's more natural than physical
