UV exposure that leads to sunburn is proven in developing melanoma, the most dangerous of the three most common types of skin cancer.
Protium - the most common isotope of hydrogen - has no neutrons in its nucleus.
Explanation:
solution 1) homogeneous
2) do not scatter light
3) cannot be separated by filtration
Colloids 1) heterogeneous
2) scatter light
3) cannot be separated by filtration
suspension 1) heterogeneous
2) may either scatter light or be opaque
3) can be separated by filtration
Answer: 1. rock stone gase from developing the other difference