Please help me find what types of reactions these are !!! ASAPP

1. synthesis 2. synthesis

because based on my knowledge there is only one element plus another, they gotta be individual I think

answer: you could do some invislibe ink.

explanation: i will tell you how to if u answer my question.

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.