Vocabulary alpha particle atomic number atomic weight beta particle element isotope isotopic abundance mass number neutron nuclide nuclide symbol proton radioactivity Before the discovery of radioactivity, all atoms of a particular element were assumed to be identical.
Side effects. Green coffee seems to cause few side effects. The caffeine in green coffee -- just like the caffeine in brewed coffee -- can cause symptoms that include: 1  Headache. 2  Upset stomach. 3  Anxiety.
Green tea contains 24 to 40 milligrams of caffeine per cup, according to MayoClinic.com, which is much lower than the 95 milligrams of caffeine in a cup of coffee and the 47 milligrams in a cup of black tea.