It would be a chemical change because the chloride water would have an effect on the copper. A way to tell if something is a chemical or physical change is that chemical change is not reversible. Physical change can be reversed. For example, water can be physically changed into ice, and it can go back into water. Hope this helps!
There are 2 valence elcetrons
Answer:
D. In a low-pressure system, air sinks, creating fair weather. In a high-pressure system, air rises, creating storms.
Explanation:
Hope this helps :)
The answer would for sure be D
