Oxoacids of Halogen Family, Properties, Structures, Halogens, Questions (For CBSE, ICSE, IAS, NET, NRA 2022)

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What Are Oxoacids?

If the acid contains oxygen (called an oxoacid) , then the suffixes and is used again, representing the lower and higher number of oxygens in the acid formula. Oxoacids contain hydrogen, oxygen, and other element Acids that contain hydrogen, oxygen, plus another element are called oxoacids.

Oxoacids of Halogens

  • Group 17 includes fluorine, chlorine, bromine, iodine, and astatine. They are collectively known as halogens, meaning salt producers. The members of this group highly resemble each other. There is a regular gradation in physical and chemical properties as we move down the group.
  • Astatine is the only radioactive element of the group. There are seven electrons in their valence shell one electron short from the nearest noble gas configuration. Halogens have a small size due to their effective nuclear charge.
  • Hence, they do not have a tendency to lose electrons, rather they readily gain an electron to complete their octet. Halogens form several oxoacids (they are acids which contain oxygen in the acidic group) .
Oxoacids of Halogen Family
Types of Chlorite
Dichlorine monoxide
Dichlorine Monoxide
Chlorine oxide
Chlorine Oxide
Dichlorine Hexoxide
Dichlorine Hepoxid
Dichlorine Hepoxide
Dichlorine Hepoxid

Oxoacids of Halogen Family

Properties of Halogen Oxoacids

  • Fluorine has a very small size and high electronegativity. Therefore, it forms only one oxoacid, HOF which is known as fluoric (I) acid or hypofluorous acid. The other elements of the halogen family form several oxoacids. They cannot be isolated in the pure state. They are stable in aqueous solution or in the form of salts.
  • Halogens generally form four series of oxoacids namely hypohalous acids ( oxidation state) , halous acids ( oxidation state) , halic acids ( oxidation state) and perhalic acids ( oxidation state) .
  • Chlorine forms four types of oxoacids. That is (hypochlorous acid) , (chlorous acid) , (chloric acid) and lastly (perchloric acid) .
  • Bromine forms (hypobromous acid) , (bromic acid) and (perbromic acid) . Iodine forms (hypoiodous acid) , (iodic acid) and (periodic acid) .

Structures of the Oxoacids of Halogens

Types of Oxoacids

Types of Oxoacids

  • The central atom in the oxoacids is hybridized. Every oxoacid has essentially one bond. Whereas most oxoacids have bonds present in them. This double bond between oxygen and halogen is d pi-pi in nature.
  • In the series of oxoacids, the first member possesses high acidic strength. This is only due to the high electronegativity and small size of the halogen atom. The acidic strength increases with an increase in the oxidation number of halogens.


  • The halogens are the elements that form group 17 of the periodic table. They are reactive nonmetals and include fluorine, chlorine, bromine, and iodine.
  • Halogens are highly reactive non-metals. These elements greatly resemble in property with each other. Group 17 elements are collectively called as halogens (In Greek: halo means salt and genes mean producing, so collectively salt producing) and it consists of fluorine, chlorine, bromine, iodine, and astatine.
  • The similarity to this extent is not found in other groups of the periodic table. They have a regular gradation in the physical and chemical properties. Astatine is the only radioactive element in the group. They have seven electrons in their outermost shell () and are short of one electron from the configuration of the nearest noble gas. The chemical properties and reactivity of an element are determined by the oxidation state exhibited by them.
Halogens Are the Elements


What is the Halogen Family on the Periodic Table?


Halogen, any of the six nonmetallic elements that constitute Group 17 (Group VIIa) of the periodic table. The halogen elements are fluorine (F) , chlorine (Cl) , bromine (Br) , iodine (I) , astatine (At) , and tennessine (Ts) .

What is the Oxidation Number for the Halogens Group 17?



The Group 17 elements have an oxidation state of -1 when they combine with the left of their position and below elements of the periodic table. The elements of Group 17 of the periodic table are known as Halogens. Halogens are reactive nonmetals and include fluorine, chlorine, bromine, and iodine.

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