Question

the periodic table quick check
which two groups of elements in the periodic table are the most reactive? (1 point)
alkaline earth metals and halogens
noble gases and alkali metals
alkali metals and halogens
halogens and noble gases

Explanation:

Alkali metals (Group 1) have one valence electron, which they easily lose. Halogens (Group 17) have seven valence electrons and readily gain one electron. Noble gases (Group 18) have a full valence shell and are unreactive. Alkaline earth metals (Group 2) are reactive but less so than alkali metals.

Answer:

alkali metals and halogens