Answer:
Chemical
Explanation:
The change was chemical, because it can no longer be returned to the original form. You cannot get back the bubbles or fizz from the air.
In order top top to bottom
F
F
T
T
F
F
T
T
After a chemical change, the substance always changes. It's only after a physical change that the substance does not change. Hope I helped :)
If the half-life is 8.0 hours and there are 24 hours in a day, the radioisotope reaches its half-life 3 times.
Therefore, after a full day, there are 24 g of the sample left, and 168 g has decayed.
