Results published in journals provide the most reliable information about new discoveries because

The given blank can be filled with that they are reviewed by the experts.

Explanation:

A journal can signify towards many things. In its native term, it signifies towards the daily record of activities. In publishing, it can also signify towards different serials or periodicals. An academic journal refers to a generic term signifying towards the scholarly and academic periodicals in general. The scientific journal refers to an academic journal aiming at science, while the medical journal is an academic journal aiming at medicine.

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.