What's the difference between ionization and dissociation? Question options:

A) Ionization breaks covalent bonds, and dissociation breaks ionic bonds.
B) Ionization involves complete breakdown, while dissociation is only partial.
C) Ionization breaks ionic bonds, and dissociation breaks covalent bonds.
D) Ionization results in the formation of charged ions, while dissociation doesn't.

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.

the dependant variable is spilled water

the independent is the heat