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.
The amount of caffeine in tea also can be compared to caffeine in chocolate. Green tea is much lower in caffeine than coffee, containing between 15-40 milligrams per eight-ounce cup. Black tea has an average of 50 milligrams of caffeine per cup.