Answer:
Burning Paper
Explanation:
Burning Paper is an example of a chemical change because;
- A new substance called ''Ash'' is formed.
- It is an irreversible reaction.
Decomposition using water polymerization
Answer:
hydrogen
Explanation:
it diffuses faster compared to helium since it is less dense
Unmmmm i’m not quite understanding brhajsnsbfbfhrndnsnsjsmsbgbtieoou that but yes
You would divide 140 (How many electrons) by the numbers of lines.