Toxicology Exam quiz and answers
graded A+
Organic Contaminants - ANS✅✅Pathogens, PAHs, Halogenated Hydrocarbons, Persistent Organic
Pollutants (POPs), Poly Fluro Alkyl Sulfonates (PFAS)
PAHs - ANS✅✅Polycyclic Aromatic Hydrocarbons
POPs - ANS✅✅Persistent Organic Pollutants
PFAS - ANS✅✅Poly Fluro Alkyl Sulfonates
Halogenated Hydrocarbons - ANS✅✅DDD, DDE, DDT, 2,4-D and 2,4,5-T, PCBs
Poly Fluro Alkyl Sulfonates - ANS✅✅PFOA, PFOS, PFTDA
Inorganic Contaminants - ANS✅✅Nutrients, Metals/Metalloids, Radionuclides
Nutrients - ANS✅✅P, N, C, K, Eutrophication (Cultural/Natural), P - Control in Freshwater, N -
Control in Marine Waters, Nitrate - Methylmeglobenemia (Blue Baby Disease).
Metals/Metalloids - ANS✅✅Pb, Zn, Cd, Cu, Hg, Cr, Ni, As, Sb
Radionuclides - ANS✅✅Alpha, Beta, Gamma, U/Th Series, Produced by the fission of relatively
heavy elements such as Uranium, Thorium, and Plutonium. Measured in terms of picocurie (pCi): 3.7
x 10^-2
Pb - ANS✅✅Lead
Zn - ANS✅✅Zinc
Cd - ANS✅✅Cadmium
, Cu - ANS✅✅Copper
Hg - ANS✅✅Mercury
Cr - ANS✅✅Chromium
Ni - ANS✅✅Nickel
As - ANS✅✅Arsenic
Sb - ANS✅✅Antimony
Electrolysis Test - ANS✅✅Consists of dissolving the element in acid and running an electric current
through the solution. If the element is metallic, the atoms of the element will show a positive
charge. That is they will seek the negative pole.
Physical Properties of Metals/Metalloids - ANS✅✅Good conductors of heat and electricity,
malleable and ductile in a solid state, show luster, are opaque, high density, solids (one exception),
crystal structure defined by an atom surrounded by eight to twelve near neighbors.
Chemical Properties of Metals/Metalloids - ANS✅✅Have one to four valence electrons, have low
ionization potentials (readily lose electrons), good reducing agents, and are electropositive.
Heavy Metals - ANS✅✅These elements are often considered as the most harmful to aquatic
ecosystems and are of particular concern to site assessments because they can be extremely toxic to
humans at high concentrations. Includes Pb, Hg, Zn, and others, most of which are transition
elements.
PCBs - ANS✅✅Polychlorinated Biphenyls
Persistent Organic Pollutants - ANS✅✅Propensity to accumulate in biota, a strong tendency for
concentrations to increase up the food chain (i.e., biomagnify), their ability to be transported over
long distances, their potential to be toxic to both humans and other animals at very low
graded A+
Organic Contaminants - ANS✅✅Pathogens, PAHs, Halogenated Hydrocarbons, Persistent Organic
Pollutants (POPs), Poly Fluro Alkyl Sulfonates (PFAS)
PAHs - ANS✅✅Polycyclic Aromatic Hydrocarbons
POPs - ANS✅✅Persistent Organic Pollutants
PFAS - ANS✅✅Poly Fluro Alkyl Sulfonates
Halogenated Hydrocarbons - ANS✅✅DDD, DDE, DDT, 2,4-D and 2,4,5-T, PCBs
Poly Fluro Alkyl Sulfonates - ANS✅✅PFOA, PFOS, PFTDA
Inorganic Contaminants - ANS✅✅Nutrients, Metals/Metalloids, Radionuclides
Nutrients - ANS✅✅P, N, C, K, Eutrophication (Cultural/Natural), P - Control in Freshwater, N -
Control in Marine Waters, Nitrate - Methylmeglobenemia (Blue Baby Disease).
Metals/Metalloids - ANS✅✅Pb, Zn, Cd, Cu, Hg, Cr, Ni, As, Sb
Radionuclides - ANS✅✅Alpha, Beta, Gamma, U/Th Series, Produced by the fission of relatively
heavy elements such as Uranium, Thorium, and Plutonium. Measured in terms of picocurie (pCi): 3.7
x 10^-2
Pb - ANS✅✅Lead
Zn - ANS✅✅Zinc
Cd - ANS✅✅Cadmium
, Cu - ANS✅✅Copper
Hg - ANS✅✅Mercury
Cr - ANS✅✅Chromium
Ni - ANS✅✅Nickel
As - ANS✅✅Arsenic
Sb - ANS✅✅Antimony
Electrolysis Test - ANS✅✅Consists of dissolving the element in acid and running an electric current
through the solution. If the element is metallic, the atoms of the element will show a positive
charge. That is they will seek the negative pole.
Physical Properties of Metals/Metalloids - ANS✅✅Good conductors of heat and electricity,
malleable and ductile in a solid state, show luster, are opaque, high density, solids (one exception),
crystal structure defined by an atom surrounded by eight to twelve near neighbors.
Chemical Properties of Metals/Metalloids - ANS✅✅Have one to four valence electrons, have low
ionization potentials (readily lose electrons), good reducing agents, and are electropositive.
Heavy Metals - ANS✅✅These elements are often considered as the most harmful to aquatic
ecosystems and are of particular concern to site assessments because they can be extremely toxic to
humans at high concentrations. Includes Pb, Hg, Zn, and others, most of which are transition
elements.
PCBs - ANS✅✅Polychlorinated Biphenyls
Persistent Organic Pollutants - ANS✅✅Propensity to accumulate in biota, a strong tendency for
concentrations to increase up the food chain (i.e., biomagnify), their ability to be transported over
long distances, their potential to be toxic to both humans and other animals at very low
