Beryllium is found in emerald gemstones. Emeralds have the formula Be3Al2(SiO3)6 . The green color in emeralds comes from trace amounts of chromium or vanadium. next element                                           previous element

Lithium is used in batteries in cell phones. The flow of electrons through a lithium battery can be explained by the following reactions: Li (in graphite) –> Li+ (aq) + e– (half reaction at negative electrode) Li+ (aq) + e– –> Li (in CoO2 ) (half reaction at positive electrode) Overall reaction: Li(in graphite) –> […]

    Helium was first discovered on the sun though an analysis of the solar spectrum. At normal temperatures and pressures, helium exists as a monoatomic gas. The density of helium gas (0.2 grams per liter) is less than that of air (1.2 grams per liter), and because of this a balloon filled with helium […]