### element | metal | mercury:

Airborne mercury
* can come from miles away, even across state lines.
* falls back to earth in precipitation, ending up in lakes.
* is captured by rain drops and deposited on the landscape when it rains.
* settles over waterways, polluting rivers and lakes and contaminating fish.

Atmospheric mercury
* is one of the most worrying of the airborne trace metal issues of today
  - oxidized, then returns to the water surface in rain
* mixes with rain and snow and falls into lakes and waterways.

Inorganic mercury
* cause of allergic contact dermatitis.
* heavy, silver-white metal that is liquid at room temperature.
* is absorbed from the lungs and gastrointestinal tract
  - found in nature
  - usually a white powder or crystals
* steals methyl groups from methylcobalamin, and methyl mercury is formed.

Mercury toxicity
* can cause nearly every disorder known to man.
* looks much like autism.

Metallic mercury
* hazardous material that can vaporize at room temperature.
* is considered a recyclable, rather than hazardous waste.
* is highly toxic by skin absorption, inhalation, and ingestion
  - in an ampoule attached to a bimetal sensing element
* is used in thermometers, fluorescent bulbs, and barometers
* passes into the brain and fetus.
* shiny, silver-white, odorless liquid.

Organic mercury
* is absorbed reasonably well by the gastrointestinal tract
  - through the digestive tract and also through vapors
  - of more concern at environmental levels
  - the most poisonous form
* passes into the breast milk as well.

Planet mercury
* Some planet mercury has gravity.
* plays important roles

Molybdenum
* Most molybdenum is used as an alloying element in steels.
* deficiencies cause yellow mottling and dead spots on the leaves.
* is metal

### element | metal:

Nickel
* Most nickel is used to make stainless steel.
* Some nickels contain copper.
* are chemical elements
  - coin
  - loose change
  - metallic elements
  - transition metal
  - u.s
* brings significant environmental benefits to products, processes and society.
* can irritate skin.
* combines easily with other metals to form mixtures called alloys.
* comes in contact with.
* contains an actual size microfilm.
* forms a series of complexes with aqueous ammonia.
* gives glass a greenish color.
* helps provide strength and toughness and improves corrosion resistance.
* includes atoms.
* is chiefly valuable for the corrosion-resistant alloys it forms such as stainless steel
  - easy to work and can be drawn into wire
  - essential to the steel-making process which is heavily dependent on scrap metals
  - ferromagnetic and fair conductor of heat and electricity
  - good at standing up to the elements and resisting oxidation as well
* is hard, ductile, malleable, and ferromagnetic
  - malleable, ductile, and somewhat ferromagnetic
  - magnetic, hard, malleable , and ductile
  - malleable so coins can be struck to show the finest detail
  - present in most meteorites
* looks like silver, thus is readily acceptable, while holding far less metallic value.
* mixes well with other metals to make many useful alloys.
* occurs in nature principally as oxides, sulphides and silicates
  - some beans where it is an essential component of some enzymes
  - occasionally free in nature but is mainly found in ores
* offers good corrosion resistance though it does become dull over time, and is expensive.
* ores grade evolution in some leading nickel producing countries.
* oxidizes slowly at room temperature and is considered corrosion-resistant.
* plays a role in the metabolism of glucose, lipids, hormones, and membranes.
* protects metallic objects from corrosion and promotes excellent leveling.
* reacts readily with nitric acid yielding nickel nitrate.
+ Nickel, Safety: Chemical elements :: Metals :: Transition metals
  * Nickel can irritate skin. That is why nickel jewelry is bad for some people. Some nickel salts are carcinogens.