which element is classified as an alkali metal?\no rb\no sr\no zr\no cl

which element is classified as an alkali metal?\no rb\no sr\no zr\no cl
Answer
Brief Explanations:
Alkali metals are in Group 1 of the periodic table. Rb (rubidium) is in Group 1. Sr is an alkaline - earth metal (Group 2), Zr is a transition metal, and Cl is a halogen.
Answer:
Rb