Answer:
+3
Explanation:
If an atom loses electrons, it becomes positive. Because silver loses 3 electrons, the charge becomes positive 3.
Answer:
84%
Explanation:
2100 j out / 2500 j in = .84 = 84%
What are the choices? I can still help answer but there aren’t any following answers lol
the environment is Healthy
Answer:
Physical
Explanation:
The change of density alone is a physical change, but there might be some chemical change that results in physical change. For example: Burning a piece of paper will definitely change the density of the paper as some of its content is being changed into smoke which is a gas. So there will be a change in volume which in turn leads to change in density. Therefore, the change of density alone is a physical change, but the change might occur due to another chemical change.
#Please mark my answer as brainliest#
