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Elements
Chemical elements and element groups
Subtopics:
Chemical element groups (6 items)
Chemical elements (56 items)


Results 41 - 50 of 63 listed by similarity [list alphabetically]
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.
PDF Mercury and halogens in coal--Their role in determining mercury emissions from coal combustion [More info]
Explains the complex relationships between coal, mercury, and halogens in light of ongoing efforts to reduce the emission of mercury into the environment.
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.
PDF Nickel - Makes stainless steel strong [More info]
Uses, sources, and history of Nickel as a mineral commodity.
PDF Niobium and tantalum: indispensable twins [More info]
Explains why these elements are commonly discussed together, how they are used, where we get them, and prospects for future supply and demand.
Nutrients in the Nation's streams and groundwater: National findings and implications [More info]
Despite public sector efforts to reduce nonpoint-source nutrients in streams and rivers, concentrations have remained the same or increased, continuing to pose risks to aquatic life and human health.
PDF Occurrence, distribution, and concentrations of selected contaminants in streambed- and suspended-sediment samples collected in Bexar County, Texas, 2007-09 [More info]
Study showing which chemicals found in sediments were most common, with methods used and likely consequences of their high concentrations.
Periodic table page [More info]
An "image map" periodic table and short notes about many isotopes and their applications to illustrate the uses of assorted isotopes in hydrology, geology, and biology.
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