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.
On average, a cup of green tea contains 3â30 mg of caffeine. Black tea has 30â60 mg of caffeine. A can of cola contains about 34 mg of caffeine. Coffee has the highest amount, with 65â100 mg in instant coffee and some drip-filtered coffee going as high as 200 mg per cup.