If 165. mg of fluorine-18 is shipped at 8: 00 a. m., how many milligrams of the radioisotope are still active after 330 min ?

Reduction is a reaction which results in a in electrons and a in positive charge of the atom or ion 1) a- loss 1) b- gain 2) a-increase 2) b-decrease

8) warming your hands by a fire is an example if which heat transfer? a. conduction b. convection c. radiation d. none of these

Which factor is likely to impact the possible number of compounds? presence of unlimited number of elements in the periodic table the inability of atoms to align perfectly with other atoms the ability of all elements to react with every other element all elements being equally reactive