Answer: The given statement is true.
Step-by-step explanation:
Elements of group 1 are also known as alkali metals. Elements that belong to this group are lithium, sodium, potassium, rubidium, cesium and francium.
Being group 1 elements, all these contain only one valence electron. Therefore, they are highly reactive in nature because it is easy to lose one electron as compared to lose two or more electrons.
As a result, they readily form compounds with non-metals.
Thus, we can conclude that the statement most chemically reactive metals are in Group 1 of the periodic table, is true.