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Chemical elements
Chemical substances distinguished by atomic number. http://periodic.lanl.gov/
Subtopics:
Aluminum (3 items)
Antimony (1 items)
Arsenic (14 items)
Astatine (1 items)
Barium (2 items)
Beryllium (2 items)
Boron (7 items)
Bromine (1 items)
Cadmium (3 items)
Carbon (7 items)
Cerium (4 items)
Chlorine (2 items)
Chromium (8 items)
Cobalt (3 items)
Copper (4 items)
Dysprosium (5 items)
Erbium (5 items)
Europium (5 items)
Fluorine (6 items)
Gadolinium (5 items)
Gallium (1 items)
Germanium (1 items)
Gold (3 items)
Holmium (5 items)
Iodine (1 items)
Iron (3 items)
Lanthanum (4 items)
Lead (8 items)
Lutetium (5 items)
Magnesium (1 items)
Manganese (1 items)
Mercury (8 items)
Molybdenum (7 items)
Neodymium (5 items)
Nickel (3 items)
Niobium (1 items)
Nitrogen (3 items)
Phosphorus (4 items)
Platinum (1 items)
Potassium (1 items)
Praseodymium (5 items)
Prometium (5 items)
Radium (1 items)
Radon (2 items)
Samarium (5 items)
Scandium (1 items)
Selenium (3 items)
Silver (1 items)
Strontium (6 items)
Sulfur (1 items)
Tantalum (1 items)
Terbium (5 items)
Thulium (5 items)
Tin (2 items)
Titanium (1 items)
Tungsten (2 items)
Uranium (4 items)
Vanadium (7 items)
Ytterbium (5 items)
Yttrium (4 items)
Zinc (6 items)


Results 31 - 40 of 63 listed alphabetically [list by similarity]
Groundwater quality in the Mojave area, California [More info]
Six elements with human-health concerns were detected at high concentrations: arsenic, boron, fluoride, molybdenum, strontium, and vanadium. Lead was present at moderate concentrations.
Groundwater quality in the Northern San Joaquin Valley, California [More info]
Arsenic and boron were the trace elements that most frequently occurred at high concentrations. Fumigants (pesticides) were detected at high concentrations in 3% of the primary aquifers. Herbicides and insecticides were detected at low concentrations.
Groundwater quality in the Owens Valley, California [More info]
Trace elements boron, arsenic, and molybdenum were found at high concentrations in 15% of primary aquifers in this area.
Groundwater quality in the San Diego Drainages Hydrogeologic Province, California [More info]
Vanadium and boron were detected at high and moderate concentrations in this area. High concentrations for these constituents were detected almost exclusively in samples collected in the Temecula Valley study area.
Groundwater quality in the north San Francisco Bay groundwater basins, California [More info]
Summary of chemical constituents of ground water that are of concern to human activity in this area. Arsenic is the constituent that occurs most frequently in high concentrations.
PDF Investigating atmospheric mercury with the U.S. Geological Survey mobile mercury laboratory [More info]
Explains sources of mercury in the air, ways in which mercury is concentrated in animals, and describes how we measure deposition of atmospheric mercury, with summaries of observations.
PDF Lead Poisoning in Wild Birds [More info]
Even though lead usage has declined due to environmental awareness and regulation, several human sources of lead continue to affect birds. Hunting ammunition and fishing gear are ingested by the birds, with toxic effects.
PDF Lead-Soft and easy to cast [More info]
Explains how we use lead, where it comes from, and how we might ensure that we have adequate supplies of this mineral commodity in the future.
PDF Lithium: for harnessing renewable energy [More info]
Explains how this element is used, where we get it, and prospects for future supply and demand.
Mercury Concentrations in Streams Found to Go Through Daily Cycles [More info]
Research findings and examples of application to real problems--highly variable conditions cause the production of toxic methyl mercury in the environment which accumulates in fish.
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