What type of bonds hold the oxygen and hydrogen atoms together in a water molecule? 1. covalent bonds
2. intermolecular bonds
3. lonic bonds
4. metallic bonds

i'm not sure

explanation:

i'll try whatever you got

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

i do not get it   at all