Answer:
Explanation:
1) Alkali metals and halogens both need to achieve a stable outer electron shell, requiring alkali metals to lose one electron and halogens to gain one.
2) They share an identical count of outer shell electrons.
3) Typically, they have elevated melting points.
4) They exhibit low reactivity or none at all.
5) They belong to group 7.
Response:
The alteration in color.
Explanation:
The apple browns due to the oxidation process. This occurs when oxygen and water molecules from the air interact with it, resulting in oxidation. The oxidation process is notably rapid at room temperature.
For instance, if the peeled apple is placed in the refrigerator, it takes longer to oxidize and turn brown, but if left at room temperature, it quickly turns brown.
When oxygen interacts with the peeled apple, it activates the polyphenol oxidase enzyme, oxidizing the phenolic compounds and forming quinones, which then react with amino acids to create the brown coloration.
