CHMM Practice Exam

When polonium (atomic mass 210 & atomic number 84) emits an alpha particle, which of the following decay products results? a. Bismuth (atomic mass 209 & atomic number 83) b. Lead (atomic mass 206 & atomic number 82) c. Thallium (atomic mass 204 & atomic number 81) d. Mercury (atomic mass 201 & atomic number 80) - Answer- b. Lead (atomic mass 206 & atomic number 82) Atomic Mass is: a. the number of protons in the nucleus b. the total number of protons & neutrons in the nucleus c. a nuclear particle that has an atomic weight of one and is electrically neutral d. a particle that contains all the positive charge and essentially all the weight of the atom - Answer- b. the total number of protons & neutrons in the nucleus Which of the following is not a chemical asphyxiant? a. carbon monoxide b. carbon dioxide c. hydrogen sulfide d. hydrogen cyanide - Answer- c. hydrogen sulfide Which of the following displaces oxygen but does not actually interfere with the human body's ability to use oxygen? a. carbon dioxide b. nitrogen c. noble gases d. all of the above - Answer- d. all of the above Which of the following statements regarding oxidation is always correct? a. oxygen must be a chemical reactant for an oxidation reaction to occur b. oxidation is a violent reaction that always produces heat and light c. oxidation always results in at least one electron being transferred from one atom to another d. the valence of the atom is reduced occurs when it gives up an oxidation electron - Answer- c. oxidation always results in at least one electron being transferred from one atom to another Which of the following seven steps for preparing hazardous materials for transport is in the correct order? a. proper shipping name, classify, package, mark, label, paperwork, placard b. classify, proper shipping name, package, mark, label, paperwork, placard c. package, classify, proper shipping name, mark, label, paperwork, placard d. package, mark, label, classify, proper shipping name, paperwork, placard - Answer- b. c