Final answer:
The very reactive group of elements never found uncombined in nature is the Alkali Metals (Group 1), which includes lithium, sodium, potassium, rubidium, cesium, and francium.
Step-by-step explanation:
The group or family of elements that are very reactive and are never found uncombined in nature is the Halogens. This group consists of elements such as fluorine, chlorine, bromine, iodine, and astatine. Halogens belong to Group 17 on the periodic table and have the general electron configuration ns²np5, which makes them very reactive since they are one electron short of having a full outer shell. The most reactive group of metals on the other hand are the Alkali Metals, which is Group 1 on the periodic table, not to be confused with the Halogens. Alkali metals include lithium, sodium, potassium, rubidium, cesium, and francium. While Hydrogen also appears in Group 1, it is not considered an alkali metal. Therefore, the correct answer to the student's question is B) Alkali Metals, as they are very reactive metals that are never found uncombined in nature.