Atomic Number: 37
Atomic Weight: 85.4678
Protons: 37
Neutrons: 48
Electrons: 37
Group: Alkali Metals (IA)
Brief Description:
Rubidium is a metal, one of four in all the elements that can be liquid near room temperature. As a solid, it is metalic silver, and oxidizes rapidly. It is also highly reactive with water.