“Halogens (Halogen Atoms)”  

Halogens

  In chemistry, a Halogen formerly used as the trivial name for the group 17 (formerly group VIIa) elements of the periodic table, the term "halogen" means "salt-former" and compounds containing halogens are called "salts".

Halogen Atoms

  All five Halogen atoms are non-metallic and generally electronegative with 7 electrons in their outer shells, giving them an oxidation number of -1.
The halogens exist, at room temperature, in all three states of matter:

• Solid- Iodine, Astatine
• Liquid- Bromine
• Gas- Fluorine, Chlorine

  The five halogens are:

• fluorine (F)
• chlorine (Cl)
• bromine (Br)
• iodine (I)
• astatine (At)

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“Halides”  

Halide

  In chemistry, a Halide is a binary chemical compound, of which one part is a halogen atom and the other part is an element or radical that will either be less electronegative, or more electropositive than the halogen.

Halide Ions

  A Halide ion is any halogen atom bearing a negative charge.
  Examples of halides include:

• halide salts
• organohalogen compounds

• acyl halides
• Chloramine
• Dimethylcarbamoyl chloride
• sulfinyl halide

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“Halogenation”  

  In chemistry, Halogenation is a chemical reaction involving the covalent attachment of one or more halogens to a compound or material.
  In our body, a halogenation may occur as a metabolic processes.
  Examples of halogenation include:

• chlorination
• iodination
• bromination
• fluorination

Also:

• halogenated hydrocarbons

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“Fluorine (F)”  [Atomic Number: 9] 

Fluorine

  The trace element Fluorine (F) is a reactive nonmetal element, and the lightest halogen chemical element with atomic number 9, represented by the symbol F, found as the thirteenth most abundant element in the earth's crust yet not naturally found as a free element on earth.
In elemental science, Fluorine (F), is a p-block element, located at the group 17 (aka fluorine group), period 2 of the periodic table of elements.
  Chemically, a diatomic gas Fluorine (symbol F) is one of the strongest oxidizing agents known, similar to, and even more reactive and dangerous than, it's halogen's cousin elemental chlorine (Cl).

Fluorine, in its elemental form, is a pale yellow, highly toxic and corrosive gas which uniquely affects the properties of organic molecules, through strong polar interactions due to the atom's high electronegativity and small size.
  Examples of fluorine (F) related topics include:

• fluorine isotopes
  • fluorine radioisotopes
• fluorination
• fluorine compounds (fluorinated compounds)
• fluorides

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“Chlorine (Cl)”  [Atomic Number: 17] 

Chlorine (Cl) as Chloride (Cl)

  In chemistry, Chlorine (Cl), a greenish-yellow diatomic gas, is a reactive nonmetal element of the halogen family of elements with an atomic weight 70.906.
In elemental science, Chlorine (Cl), is a p-block element, located at the group 17, period 3 of the periodic table of elements.

Chlorine Biochemically

  

Chlorine (Cl) as Chloride (Cl)

In our body, the salts of Chlorine (Cl), as Chloride (Cl^{−}) is an essential nutrient.
  Examples of chlorine (Cl) related topics include:

• chloride (Cl)
• chlorination
• chlorine compound

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“Bromine (Br)”  [Atomic Number: 35] 

Bromine

  In chemistry, Bromine (Br) is a fuming red-brown liquid reactive nonmetal element and a halogen member, with an atomic weight of 79.904, and liquid at standard conditions for both temperature and pressure.
In elemental science, Bromine (Br), is a p-block element, located at the group 17, period 4 of the periodic table of elements.

Bromine (as Bromide)

  In our body, Bromine (Br), as ionic bromide, is a unique and an essential halogen element that acts as a co-factor, enabling peroxidasin to form the sulfilimine bond essential for both development and tissue architecture.

Bromine Biochemically

In our body, Bromine (Br) is a volatile liquid with suffocating vapors, corrosive to the skin, and if ingested can cause severe gastroenteritis.
  Examples of bromine (Br) related topics include:

• bromine isotopes
  • bromine radioisotopes
• bromination
• bromine compounds

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