Is I2 Polar Or Nonpolar

Polarity of I2

Iodine (I2) is a chemical compound that is naturally present in the ocean, air soil, and seawater. But the most important source of iodine (I2) is the oceans.

The French scientist Bernard Courtois discovered the iodine in 1811.

The color of the iodine in water is light orange-brown. 

The iodine has free electrons when sunlight falls on it so that the free electrons will reflect the light and then the iodine will be shine.

Iodine is an antiseptic that kills the bacteria, and it can cause irritation to the skin.

Is I2 polar or nonpolar, If you are wondering about this query, this article will help you to clarify all your confusion.


The chemical formula of iodine is I2.

Is I2 Polar Or Nonpolar

Explanation 1:

The Iodine (I2) is a nonpolar molecule because the iodine molecule is made of two identical atoms of iodine. The electronegativity values of both atoms are the same, which means that the electron makes a covalent bond that is shared equally between the two atoms of iodine and has no partial charge. Therefore, I2 is a nonpolar molecule.

Explanation 2:

The Iodine (I2) is a nonpolar molecule because it is symmetric in shape and both iodine atoms share equal charge and have similar electronegativity so for that net dipole moment of I2 become zero, which resulting as a nonpolar molecule.

Explanation 3:

The Iodine (I2) is a nonpolar molecule because of its linear structure and both atoms same electronegativity. 

Explanation 4:

The Iodine (I2) is a nonpolar molecule because in iodine the I-I bond exists between two same atoms. Therefore, there is a difference in both two atoms electronegativity that is why I2 considered as a polar molecule.


Simple is that Iodine (I2) is a polar molecule because it contains two atoms of iodine, and both are nonpolar. For a detailed overview, check out the above paragraph.

With that, it’s also essential to know about the PcL3SF3 and SO3 polarity.

Iodine (I2) Molecular Geometry

The shape of the Iodine (I2) is linear, and its polarity is nonpolar.


I have done proper research about I2 molecular geometry, but I didn’t get more content about it so if you have any idea about its shape in detail leave a comment that will help our readers.

Lewis Structure Of Iodine (I2)

two iodine atoms
I2 Lewis Structure

In the Lewis structure of I2, there are two identical atoms of iodine.

To draw the I2 lewis structure, follow the below instructions.

  • First of all, find out the total number of valence electrons in the I2 using the periodic table.
  • The iodine in group 7 on the periodic table and have seven valence electrons.
  • You can determine from I2 that we have two iodine atoms so multiply valence electrons with two which become 7×2=14.
  • We have a total of 14 electrons, spread those valence electrons around the two iodine atoms to form a chemical bond and complete the octet.
  • Ensure that each iodine has 8 electrons.
  • To form a chemical bond add two valence electrons between two iodine atoms.
  • As you can see in the above figure that each iodine atom has eight valence electrons, so that’s the Lewis structure for I2.

If you are still confused to draw I2 Lewis structure, watch this video that will help you to clarify all your confusion.

I2 Dipole Moment

In I2 structure, both iodine atoms attached at a 180° angle, and both have the same electronegativity; therefore, the dipole moment of I2 will be net-zero.

If the electronegativity is larger so there might be more chances of larger dipole moment, When there is the difference in electronegativity and separation in charge, so the dipole moment occurs.

Do you want to know the reason why I2 is leading to net dipole?

The Iodine (I2) is leading to the net dipole because of its symmetric structure and sharing of electrons equally between two atomic centers, so there is no dipole moment.


The iodine (I2) has no dipole moment.

Is I2 Ionic Or Covalent

Iodine (I2) forms a non-polar diatomic covalent molecule. Each iodine molecule consists of 2 iodine atoms, which are held together by strong covalent bonds.

In I2, both iodine atoms share electrons equally.


Simple is that iodine (I2) is a covalent bond.

Does I2 Dissolve In Water

Iodine (I2) is a nonpolar molecule since the nonpolar molecule not dissolved in water.

The iodine ions react with iodide ion and forms triiodide ion. But when iodine and iodide both meet at the water, The generated triiodide ion is soluble in water, but not in a mixture of nonpolar solvents.

Iodine dissolved in organic solvents. The organic solvents are also called carbon-based solvents.

If I talk about oil, so oil is a nonpolar and iodine is also a nonpolar molecule; therefore, I2 is soluble in oil.

Iodine is soluble in water in a solution of sodium or potassium iodide.


Iodine is not dissolved in water, but if you want to dissolve it in the water, you can readily dissolve it with the help of sodium and potassium iodide.

Is I2 a Lewis Acid Or Base

The I2 is a Lewis acid and I- is a Lewis base because a Lewis base is a species that donate a pair of electrons to an electron acceptor. In I2 I- is giving electron pair to I2 molecule.


The I2 is a Lewis acid and I- is a Lewis base.

Physical Properties Of Iodine (I2)

  • The iodine is a non-metallic and has a pungent odor.
  • Its density is 4.933 g/cm3.
  • It’s a dark-grey/purple-black, lustrous, solid element.
  • Iodine is slightly soluble in water and dissolved in some solvents, e.g. carbon tetrachloride.
  • The boiling point of I2 is (I2) 457.4 K ​(184.3 °C, ​363.7 °F) and melting point is (I2) 386.85 K ​(113.7 °C, ​236.66 °F).


Above are the physical properties of I2 now let’s move to its atomic properties.

Atomic Properties Of Iodine (I2)

  • The atomic number of I2 is 53, and the mass number is 126.9045 g.mol -1.
  • The oxidation state of iodine is −1, +1, +3, +5, +7.
  • Its specific gravity is 4.93 at 20 °C (68 °F).
  • The atomic weight of I2 is 126.9044, and the atomic radius is empirical: 140 pm.


Above are the atomic properties of I2 now let’s move to its uses.

Uses Of Iodine (I2)

  • Iodine is a mineral that is found in some foods.
  • Our body needs iodine to make thyroid hormones, which control different body functions and body metabolism.
  • Iodine is used commercially, such as for printing inks and dyes, etc.
  • I2 plays an essential role in improving thyroid health.
  • Iodine reduces the risk for some goiters.


There are many uses of iodine. I have explained a few of them.

Related Questions

Is i2 a gas?

Iodine can sublimate into purplish-pink gas. It’s a colorless gas like to the hydrogen halides. Iodine is a solid at room temperature, but if you heated it adequately, Iodine sublimes directly from solid to the gaseous state.

Is iodine gas toxic?

Yes, iodine is very toxic, it can irritating to the mucous membranes which cover the surface of internal organs. The inhalation of iodine vapor may lead to the flow of tears and headache.

Why is iodine not a gas at room temperature?

Iodine is a solid at room temperature because the force of attraction of intermolecular forces is very weak, To break these intermolecular forces or separate them more heat energy is required that is why iodine as a solid at room temperature.

What is the best form of iodine?

Pure Encapsulations iodine is considered the best form of iodine because each Encapsulations of iodine provides 225 mcg of iodine. Iodine helps to maintain healthy cellular metabolism.

How do I know if I need iodine?

There are a few symptoms of it. If you feel any fatigue or weakness in your body, then it means you need iodine. If your thyroid hormone level is low, it’s also the symptoms of iodine deficiency.

Final Thoughts

That was all about is I2 polar or nonpolar, I hope it’s now clear to you that I2 is a nonpolar molecule. If you want to know in details why I2 is nonpolar, then go to the article of second heading.

While drawing the I2 Lewis structure watch the above video or read the above points.

There is no net dipole moment in I2 because I2 are sharing electrons equally.

The Iodine (I2) is a covalent bond, and it is slightly dissolved in water. Still, if you want to dissolved I2 readily, then you can dissolve it with the solution of potassium iodide.

I have mentioned I2 properties, uses, and many more things about iodine (I2) but if you think we have missed something about I2 topic? Let us know in the comments section below we will add them.

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