Final answer:
The element that should be relabeled on the bottle is sodium (Na).
Step-by-step explanation:
The element that should be relabeled on the bottle is sodium (Na).
The question mentions that the contents of the bottle are liquid and do not look metallic. Lithium (Li) is a solid metal at room temperature and is not liquid, so it is not the correct element. However, sodium (Na) is a a shiny, soft, and highly reactive metal that exists as a liquid at room temperature. It is part of the alkali metals group, which includes lithium, sodium, potassium, rubidium, cesium, and francium.