NO3 is a polyatomic ion through a negative charge. So, the is additionally referred come by the name of nitrogen oxoanion. The compound has its chemistry name together nitrate developed after nitric mountain looses a proton indigenous it.

You are watching: No3- shape and bond angle

Nitrate is critical source the nitrogen and oxygen. That is supplied as fertilizers (like ammonium, sodium, potassium) in agricultural farms for greater solubility and biodegradability. It likewise treats heart pains.

Both nitrogen and also oxygen are vital to one ecosystem that consists of flora and also fauna.

NO3 is quickly soluble water however too much concentration in drinking water is harmful come human health and wellness that affects blood transporting oxygen.

In 1916, American chemist, Gilbert N. Lewis presented the principle of electron dot structure.

Below room some rules to frame any compound’s Lewis dot structure.

1. Monitor the octet dominion where an atom should finish its outermost covering by the total variety of 8 electrons. (Exceptions room hydrogen and also boron elements)

2. Relying on the number of atoms in a compound, calculation the total number of valence electrons.

3. Then find out the variety of bonding pairs and also lone pairs. (Bonding bag involve the number of electrons that take part in bonding between atoms and lone pairs have electrons that execute not assist atoms in bonding.)

4. ~ deciding the central atom, arrange the many electronegative atoms surrounding it.

5. Make a single bond and also count the variety of bonding electrons.

6. Calculate the lone pairs electron using the listed below formula.

Lone bag electrons = Valence electron – Bonding electrons

7. Entrust the lone pairs to the terminal atoms and make sure each completes that last covering with 8 electrons.

8. The central atom must complete its octet. Build twin or triple bonds relying on the variety of electrons the main atom has.

Construction of three Lewis dot Structure

1. In the ion NO3, over there is 1 atom of nitrogen and 3 atoms of oxygen. It likewise has one an unfavorable charge.

2. Nitrogen and also oxygen belonging to periods 5A and also 6A groups respectively in the routine table. Hence, oxygen has 6 and nitrogen has actually 5 valence electrons in their outer shell.

3. Notice the number of valence electrons.

Nitrogen: 5

Oxygen v 3 atoms- 6 * 3 = 18

Due come a negative charge, one more valence electron it s okay added: 1

5 + 18 + 1 = 24 are total valence electrons

4. To accounting the central position, the atom demands to be less electronegative. After analysis the routine table, nitrogen is the very least electronegative than oxygen, and also therefore, it becomes the central atom of the structure.

5. Begin the frame dot structure of nitrate by make 3 solitary bonds in between 3 atoms of oxygen and also nitrogen. 6 valence electrons are used.

6. Native the above information, the framework has

bond pairs – 3 pairs (6 electrons)lone pairs – 9 pairs (18 electrons)

7. Firstly, finish the octet the the terminal atoms. Native the continuing to be 18 valence electrons, arrange lock in such a means that each oxygen atom receives 6 valence electron and kind 3 lone pairs.

8. After ~ noticing nitrogen, it has only 6 valence electrons. To complete its octet, eliminate two electron from one of the oxygen atoms and make one more bond from a solitary to a dual bond.

9. The structure outcomes in 2 solitary bonds and also 1 twin bond between nitrogen and oxygen atoms as displayed in below image.


What is a official charge?

Somewhere, every atom has a formal charge on it. Formal charge plays crucial role in Lewis period structure.

It keeps a trace of the electron assuming they room equally shared between the atoms of the molecule. That does not take treatment of the atom’s electronegativity yet reflects the electron count.

If the atom has acquired the electron it will be a an unfavorable charge and if the atom loses the electrons, it will be a positive charge.

A math formula, a diagram, and the instinctive an approach are three various ways to calculation the formal charge.

The formal fee of NO3

To find out the formal charge of an separation, personal, instance atom mathematically, the formula will be

The formal fee (F.C) = (No. That valence electrons) – (No. Of non-bonding bag electrons) – (No. That bonding pair electron / 2)

F.C of oxygen making a twin bond with the nitrogen atom

F.C = 6 – 4 – (4/2) = 0 i.e. This atom does no have any kind of formal charge on it.

F.C of a nitrogen atom

F.C = 5 – 0 – (8/2) = +1 i.e. Nitrogen has actually positive officially charge.

F.C that oxygen making single bond through the nitrogen atom

F.C = 6 – 6 – (2/2) = -1 i.e. Both the oxygen atoms making a solitary bond through nitrogen have a negative formal charge.

To calculate the full charge of the nitrate ion, a pair the +ve and also –ve officially charges obtain canceled and there is only one –ve formal charge left top top the oxygen atom.

Hence, the ion has actually a an unfavorable formal charge.

Hybridization that NO3

Hybridization is a process to discover the variety of atoms attached come the central and lone pair that the atom. It researches the process of how atoms in ~ molecules are oriented in three various dimensions.

The most necessary thing in hybridization is to find out the molecular configuration of a molecule that takes location in the form of a (σ) bond and a pi (π) bond.

The very first bond is constantly a sigma bond and then the 2nd or 3rd bond in the dot framework is a pi bond.

The VSEPR theory says around the plan in accordance to discover out the number of bond pairs v calculating the variety of sigma (σ) bonds and also lone pair of central atom i.e. Steric number the is the variety of regions that electron density surrounding the atom.

Since the steric number is 3 an interpretation there space 3 solitary sigma bonds v zero lone pair leading to sp2 hybridization.

The framework itself depicts that three sp2 orbitals of nitrogen overlap with 1s orbit of the oxygen. The 2p orbitals of oxygen accommodate into a lone pair.

Nitrogen’s ns orbital makes a bond with 3 terminal oxygen atoms.

Molecular Geometry the NO3

As every VSEPR theory, girlfriend conclude the NO3 is sp2 hybridized.

The model also states that the molecular geometry that the link is trigonal planar with each orbital equidistant at 120 levels (bond angle) shame on a planar region.

The formula AX(n) N states that A is the main atom, X is the atom attached to the central atom, (n) is the number of atoms bonded, and also N is the number of nonbonding electron pairs.

Ignoring N at the minute as there is no lone pair the electrons, the formula becomes AX (3).

Hence, the formula directs come the form of the trigonal planar.

The trigonal planar form of the three molecule creates symmetry across the bonds NO bonds and as a result, the three dipoles created by NO bonds gain canceled by every other, and the as whole dipole of no3 is zero.

Therefore, the no3 is a non-polar molecule.

See more: How Long Should It Take To Walk 3 Miles ? How Long Does It Take To Walk 3 Miles



1. The nitrate ion has actually only a an adverse charge and excessive quantities of nitrate in noþeles is dangerous because that any source of environment.2. Nitrate ion is non-polar through a zero net dipole moment.3. Routine table is a great help for finding the lewis dot framework of NO3 wherein it informs around atomic numbers and also electronegativity that the elements.