The diagram shows the elements in the alkali group

Question

why do these elements have similar chemical properties
A.there are all metals
B.they are all non-metals
C.they have he same nu,ber of electrons
D.they have the same number of valance electrons

Answer 1

D. They have the same number of valence electrons

The elements in the alkali group have similar chemical properties because they all have one valence electron in their outermost energy level. This gives them similar reactivity and tendency to lose that one electron to form a stable cation.