Environmental Science 3300F/G Study Guide - Midterm Guide: Fly Ash, Sodium Sulfite, Swordfish
19 Oct 2016
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Metal a material that is typically hard, opaque, shiny, and has good electrical and thermal conductivity. About 91/118 elements on the periodic table are metals and non-metallic forms (metalloids) Toxicity the degree of strength of a poison. Acute toxicity: adverse effects of a substance that result either from a single exposure or from multiple exposures in a short period of time (>24hours); these effects should occur within 24 days of administration of the substance. Ld50 the amount of a toxic agent (poison, virus, or radiation) that is sufficient to kill 50% of the population of animals usually within a certain time (aka median lethal dose) The (cid:862)goldilo(cid:272)ks zo(cid:374)e(cid:863) (cid:894)top hat graph(cid:895) the level that is just right (too little = leads to a number of disease conditions, too much = fatal) ex. Isotope atoms having the same atomic number but a different number of protons.
