Answer:Before the reaction, there are 4 oxygen atoms,and after the reaction, there are 4 oxygen atoms.The same is true for hydrogen atoms.So, atoms are not created or destroyed.This supports the claim that matter is conserved during a chemical reaction.
Explanation:
6. Is A... the amount of nitrogen, oxygen, and other elements dissolved in water
7. Is B... grows quickly
The natural element _IODINE_ is important in the synthesis of thyroid hormone; lack of it will lead to a goiter.
Answer:
D
Explanation:
everything compared to the sun is small