### element:

Fluorine
* adds to the strength and rigidity given to bones by calcium.
* also plays a role in the composition of glass for optical fibers.
* being a cumulative bone-seeking mineral, the resultant skeletal changes are progressive.
* can be a deadly to animals after an eruption.
* colorless gas in it's elemental state.
* combines with phosphorus quite readily.
* corrosive pale yellow gas.
* entering the body rapidly moves to the hard tissues.
* forms diatomic molecules that are gaseous at room temperature.
* gaseous element which in the form of fluorides is fairly widely distributed in nature.
* halogen element.
* highly reactive element which likes to bond with other elements
  - gaseous substance
  - pale yellow gas, and found in igneous and sedimentary rock
* includes atoms.
* increases the bioavailability of calcium and helps to buffer acids present in the mouth.
* is about one and one-third times, as heavy as air.
* is also a common substitute for the hydroxyl in the brucite-like sheets
  - poisonous
  - with highly toxic and can eat away at any substance
  - enzyme poison
  - essential element in the chemical ion of fluoride
  - extremely reactive pale yellow gas
  - available commercially in cylinders but is very difficult to handle
  - chemical elements
  - considered the most active of all of the elements
  - derived from the early use of fluospar as a flux, thus the Latin fluor , to flow
* is essential for healthy dental and bone formation
  - the maintenance of solidity of our bones
  - extremely corrosive to the skin, causing damage similar to second-degree thermal burns
  - flammable gas, with a nasty smell
  - found in tap water and toothpaste, which have benifical effects on the teeth
  - gases
  - high, As are others nearby
  - highly toxic and corrosive
  - known to have thirteen isotopes
  - one of the most reactive elements
* is so electronegative that it makes a very poor leaving group
  - reactive it is produced by electrolysis
* is the most active element, so it combines with almost anything
  - of all the elements
* is the most electronegative and reactive of all elements
  - negatively charged and most chemically active of all elements on earth
  - powerful oxidizer known
  - powerfully oxidizing element
* is the most reactive and the most electronegative of all the elements
* is the most reactive of all the elements
  - the halogens and extremely dangerous to handle
  - reactive, while iodine is the least reactive
  - smallest, lightest, and most reactive member of the halogen group
  - too reactive
  - used by the body in dental and bone formations
* is used in rocket fuels, glass, enamel, and bricks
  - the production of uranium
  - tooth paste
* is used to enrich uranium for nuclear weapons
  - produce many chemicals , including several high-temperature plastics
* is very difficult to isolate
  - electronegative and bonds very tightly to the carbon
* isolate from everything.
* joins with carbon to form a class of compounds known as fluorocarbons.
* liberates energy when it condenses.
* light yellow diatomic gas.
* makes the compound more stable in an acid environment.
* member of group VIIa of the periodic table.
* occurs naturally in the earth's crust where it can be found in rocks, coal and clay.
* only forms hypofluorous acid.
* pale yellow gas that reacts with practically all organic compounds
  - yellow, diatomic, highly corrosive, flammable gas, with a pungent odor
* pale, yellow-green gas that has a strong, sharp odor.
* pollutes agricultural land.
* reacts explosively with hydrogen in a manner similar to that of alkali metals
  - vigorously with water liberating oxygen as ozone and forming hydrogen fluoride
  - violently and decomposes to hydrofluoric acid on contact with moisture
* reacts with many materials normally recommended for handling compressed gases
  - most inorganic and organic compounds
* very reactive, poisonous gas.
* yellowish, poisonous, highly corrosive gas.
+ Fluorine, Properties: Nonmetals :: Halogens
  * Fluorine is a light yellow diatomic gas. It is very reactive gas, which exists as diatomic molecules. It is actually the most reactive element. Fluorine has a very high attraction for electrons, because it is missing one. This makes it the most powerful oxidizing agent. It does not need a spark.
  * Fluorine has a very high attraction for electrons, because it is missing one. This makes it the most powerful oxidizing agent. It does not need a spark. Metals can catch on fire when placed in a stream of fluorine. After it is reduced by reacting with other things, it forms the stable fluoride ion. Fluorine is very poisonous. Fluorine bonds very strongly with carbon. It can react with the unreactive noble gases. It explodes when mixed with hydrogen
  - Safety
  * Fluorine as an element is extremely reactive and toxic. It can react with almost everything, even glass. Fluorine is also poisonous
  - Uses
  * Fluorine is used to enrich uranium for nuclear weapons. It is also used to make sulfur hexafluoride. Sulfur hexafluoride is used to propel stuff out of an aerosol can. It is also used to make integrated circuits. Fluorine compounds have many uses. Fluoride ions are in fluorine compounds
+ Halogen: Halogens
  * The elements in the group are fluorine, chlorine, bromine, iodine, astatine, and ununseptium. They are very reactive, so they are likely to join with other elements on the left side of the periodic table to make compounds. This is due to the fact that they are missing one electron. They are rarely found alone in nature, except astatine, which is not found in nature. Fluorine is the most reactive, while iodine is the least reactive. Astatine is very radioactive and hard to get.