Iodine element (I) is in group 17 and period 5 of a periodic table. Iodine is in the p-block and it is classified as a halogen group element on the periodic table.
There is a lot more information related to iodine which is mentioned in the Information Table given below.
So let’s dive right into it!
Table of contents
- Iodine element (Information Table)
- Iodine element in Periodic table
- Facts about Iodine
- Properties of Iodine
- Uses of Iodine
Iodine Element (Information Table)
The important data related to iodine element is given in the table below.
|Appearance of iodine||Solid iodine has Lustrous gray color |
Liquid iodine has Violet color
Gaseous iodine has Violet color
|Atomic number of iodine||53|
|Symbol of iodine||I|
|Atomic mass of iodine||126.90 u|
|Protons, Neutrons & Electrons in iodine||Protons: 53, Neutrons: 74, Electrons: 53|
|State of iodine (at STP)||Solid|
|Group number of iodine in periodic table||17|
|Period number of iodine in periodic table||5|
|Block of iodine in periodic table||p-block|
|Category of iodine||Nonmetals (halogens)|
|Bohr model or Electrons per shell or Electrons arrangement in iodine||2, 8, 18, 18, 7|
|Electron configuration of iodine||[Kr] 4d10 5s2 5p5|
|Orbital diagram of iodine|
|Valence electrons in iodine||7|
|Electronegativity of iodine (on pauling scale)||2.66|
|Atomic radius of iodine (van der Waals radius)||198 picometers|
|Density of iodine||4.94 g/cm3|
|1st ionization energy of iodine||10.451 eV|
|Main isotope of iodine||127I|
|Melting point of iodine (I2)||386.8 K or 113.7 °C or 236.6 °F|
|Boiling point of iodine (I2)||457.4 K or 184.3 °C or 363.7 °F|
|Crystal structure of iodine||Orthorhombic|
|Discovery of iodine||By Bernard Courtois in 1811|
Also see: Interactive Periodic Table (It has rotating bohr models as well as many other details of all the 118 elements in a single periodic table).
Iodine element in Periodic table
The Iodine element (I) has the atomic number 53 and is located in group 17 and period 5. Iodine is a nonmetal and it is classified as a halogen element.
Facts about iodine
Here are a few interesting facts about the iodine element.
- Iodine was given its name from the Greek word “iodes” (which means violet color).
- Iodine is the 47th abundant element present in the solar system.
- Iodine is the 61st abundant element found from the earth’s crust.
- There is a lot of iodine present in the sea water (around 34.5 million tons of iodine is in seawater).
- The river water contains around 5 parts per billion while the sea water contains around 50-60 parts per billion of iodine.
- Iodine is also present in our surroundings like plants, animals, soil, etc.
Properties of iodine
Here is a list of some physical properties and chemical properties of iodine.
Physical properties of iodine
- Iodine is solid at room temperature and it has a shiny gray surface.
- The density of iodine is 4.94 g/cm3 and its atomic mass is 126.90 u.
- The melting point and boiling point of iodine is 386.8 K and 457.4 K respectively.
- Iodine has many isotopes, and out of these isotopes, the stable isotope is 127I.
- The crystal structure of iodine is Orthorhombic.
Chemical properties of iodine
- Iodine is a reactive nonmetal and hence it is always found in compounds with other metals.
- Iodine is less soluble in water but it is more soluble in nonpolar solvents.
- Iodine reacts with metals and forms salts.
- The iodine has electronegativity of 2.66 on a pauling scale.
- Pure iodine can burn the skin.
Uses of iodine
Here are some uses of the iodine element.
- The iodine is present in table salt (and our body gets the required iodine from table salt).
- Iodine is also used in the manufacturing of acetic acid.
- Radioactive isotope if iodine (131I) can be used to cure cancer of the thyroid gland.
- Some antiseptics also contain iodine which kills the bacteria and germs.