Question: what is the alkaline earth metal with the smallest atomic mass?
Answer: Beryllium (Be), the smallest alkaline earth metal, is atomic number 4 on the periodic table, has an atomic weight of 9.01 amu (atomic mass unit), and melting and boiling points of 2, 348.6°F (1, 287°C) and about 4, 479.8°F (2, 471°C), respectively.