Stable isotopes are not radioactive nor dangerous.
Unstable isostopes are radioactive and have different mass of the element.
Answer:
B the atmosphere it's not on earth and I'm pretty sure the atmosphere doesn't have water in
Explanation:
Chlorine is the correct answer so A
I think its B because if u increase the mass itll have more force which will increase the momentum
With a physical change you can actually see it change like ice turning into water, then with a chemical change you can't see it change, although within the molecules themselves they change which makes that possible.
Hope this helps!
