Bohr Model of Oxygen (Diagram, Steps To Draw)

Oxygen is a non-metal that belongs to the Chalcogens, the Periodic table’s 16th group. Its atomic number is 8 and the symbol for it is O.

It is the third most prevalent element in the universe and exists as a diatomic gas. It’s an oxidising gas that’s colourless and odourless. Oxygen is necessary for a variety of processes, including combustion and cellular respiration.

Many major organic compounds, such as proteins, carbohydrates, nucleic acids, and others, include it. Plants exhale oxygen into the atmosphere, replenishing it.

Hello there, guys!!! The Bohr model of oxygen is today’s topic.

So, if you have any queries about it, you should read this post all the way through.

Let’s get started…

The Oxygen Bohr Model

The smallest unit of matter, an atom, is regarded the smallest unit of matter. A lot of theories have been proposed to explain the atom’s structure.

Ernest Rutherford proposed a concept in 1911 after several failed ideas. Almost all of the scientific community’s questions were answered by this model. It did, however, break a few classical mechanics and electromagnetic theory principles.

In 1913, Niel Bohr revised the concept and renamed it the Bohr-Rutherford model of the atom. This model improved upon the previous model’s flaws and is still acceptable today.

The Bohr model detailed the atomic structure, including the number and locations of all atomic species, such as protons, neutrons, and electrons. It also shed information on these entities’ charge and stability.

To construct the Bohr atom model for oxygen, we must first comprehend the distinct atomic species and their placements within the atom. They are as follows:

• Nucleus: The nucleus, like the sun in our solar system, is the atom’s core. Protons and neutrons are the two atomic particles that make up the nucleus.

• Protons are positively charged particles that live inside the nucleus of an atom. They are in charge of the nucleus’s overall charge. Protons are denoted by the symbol p+.

• Neutrons: These are charge-neutral species, as their name implies. They can also be found inside an atom’s nucleus. Neutrons are denoted by the letter n°.

• Electrons: Electrons are non-nuclear entities with a negative charge. They are designated by the letter e– and play a role in bond formation.

• Shells: The circular routes that electrons take to revolve around the nucleus are known as shells.

A certain quantity of energy is linked with each shell. As a result, they’re also known as energy levels. As we go out from the nucleus, the energy of the orbital grows successively.

From inside to outside, the shells are numbered 1, 2, 3, 4, etc., or K, L, M, N, etc. Additionally, each shell can only hold a certain number of electrons.

The K shell is nearest to the nucleus and has the lowest energy; it is also known as an electron’s ground state.

• Valence Electrons: The electrons that reside in an atom’s outermost shell. These are primarily responsible for the creation of bonds. The valence shell refers to the outermost shell.

According to the Bohr model of the atom, electrons acquire energy by jumping from lower to higher energy orbitals, and they release energy by jumping back from higher to lower energy levels.

According to the Bohr model, the oxygen atom’s nucleus includes 8 protons and 8 neutrons, with 8 electrons revolving around the nucleus in two energy levels.

The K shell holds two electrons, while the M shell has six. The oxygen atom possesses 6 valence electrons as a result.

Oxygen AtomValue
No. of Proton8
No. of Neutron8
Number of Electrons8
Number of shells2
Number of electrons in first (K) shell2
Number of electrons in second (L) shell6
Number of valence electrons6

How to Draw the Bohr Oxygen Model

The oxygen atom belongs to the periodic table’s 16th group.

The following is the information that we may glean from the aforementioned Oxygen box:

• Oxygen has an atomic number of 8.

• Oxygen’s electrical configuration is [He] 2s22p4.

• Oxygen’s chemical symbol is O.

• Oxygen has an atomic mass of 15.99.

We’ll now draw the Bohr model for the oxygen atom using the information we’ve gathered so far.

We need to know the number of different atomic species in an atom before we can design the Bohr model.

Let’s start by calculating the amount of protons in the oxygen atom.

The number of protons in an atom is represented by the atomic number of that element.

The atomic number of oxygen atoms is 8, as shown in the diagram above.

As a result, the oxygen atom has eight protons.

Now we’ll figure out how many neutrons there are in an oxygen atom.

The following is the formula for calculating the number of neutrons in an atom:

Atomic mass (rounded up to the closest full number) – number of protons = number of neutrons

As a result, the atomic mass of the oxygen atom is 15.99. So we get 16 if we round it up to the nearest whole number.

In addition, the number of protons in an oxygen atom is eight, as we anticipated.

When we plug these numbers into the formula, we obtain the following result:

Neutron number = 16 – 8 = 8

As a result, the number of neutrons in an oxygen atom is equal to 8.

We can sketch the nucleus of the Bohr model of the oxygen atom now that we know the values of both nuclear species, protons and neutrons. It looks like this:

Protons are represented by p+, and neutrons are represented by n°.

The total number of electrons in the oxygen atom will be calculated in the next step.

The atomic number of an atom also determines the number of electrons in that atom.

The atomic number of oxygen is 8, as previously stated.

As a result, the oxygen atom has an electron count of 8.

We’ll now place these electrons in their appropriate shells. To do so, we must first determine the maximum number of electrons that may be accommodated in each shell.

The formula 2n2, where n is the number of shells, can be used to compute the maximum number of electrons for a shell.

First, we’ll figure out how many electrons are in the first shell of the oxygen atom, the K shell.

Number of electrons in the oxygen atom’s K shell = 2n2 = 2 (1)2 = 2.

Now we’ll add these two electrons to the K shell, which will result in the following:

Using the same formula as before, we can now determine the number of electrons that can be accommodated in the second shell of the atom.

As a result, the maximum number of electrons that can fit within the L shell is 2 (2)2 = 8.

As a result, the L shell of the oxygen atom can only hold a maximum of 8 electrons.

This means that the L shell of the atom will now be filled with all six electrons left with the oxygen atom.

One point, however, should be made at this moment. The electrons are filled in a clockwise way in a group of four in any shell with more than four electrons, i.e. L shell onwards.

As a result, four of the six electrons in the L shell will be filled first, clockwise, and the oxygen atom will appear as follows:

The remaining two electrons in the L shell will now be filled as well.

The following is the Bohr model of oxygen after these electrons have been placed in the L shell:

The oxygen atom in the Bohr model has eight protons, eight neutrons, and eight electrons.

Protons and neutrons are contained within the nucleus, whereas electrons orbit the nucleus in two shells.

Two electrons are in the K shell, whereas six are in the L shell.

We can deduce that the electrical configuration of the oxygen atom is [2, 6] using this model.

We may arrange these electrons in the subatomic orbital using molecular orbital theory. As a result, two electrons fill the 1s orbital, two electrons fill the 2s orbital, and the remaining four electrons fill the 2p orbital.

As a result, the oxygen atom’s ultimate electronic configuration is 1s22s22p4.

Using the Bohr Model to Deduce Lewis Structure

The Lewis structure of an atom depicts the valence electrons that orbit it.

The atomic symbol depicts the nucleus of the atom, while electrons are portrayed as dots around it. Electron dot structures are another name for these diagrams.

The valence shell of the oxygen atom has 6 electrons, according to the Bohr model. As a result, the Lewis structure of oxygen is as follows:

Oxygen’s Characteristics

The following are some of the most important features of oxygen:

• Oxygen is a colourless gas that, when pressed, turns into a pale blue liquid.

• The melting and boiling temperatures of oxygen are respectively 54.36 K and 90.2 K.

• There are a total of 13 oxygen isotopes known, ranging from 12O to 24O. 16O, 17O, and 18O are all found in nature.

• It is known to aid in the combustion process.

• It is a non-metal element that is very reactive and oxidising.


The nucleus of oxygen, according to the Bohr model, comprises 8 protons and 8 neutrons. The oxygen atom also has 8 electrons that orbit the nucleus in two shells: the K shell, which has 2 electrons, and the L shell, which has 6 electrons.

The number of protons and electrons in an atom is represented by its atomic number.

The following formula can be used to compute the number of neutrons in an atom:

Atomic mass (rounded up to the closest full number) – number of protons = number of neutrons

2n2, where n is the number of shells, is the maximum number of electrons that can be packed in a shell.

Two electrons are present in the K shell and six electrons are present in the L shell in the Bohr model of the oxygen atom.

Read more: Geometry, Hybridization, and Polarity of CH3CN Lewis Structure

Misha Khatri
Misha Khatri is an emeritus professor in the University of Notre Dame's Department of Chemistry and Biochemistry. He graduated from Northern Illinois University with a BSc in Chemistry and Mathematics and a PhD in Physical Analytical Chemistry from the University of Utah.


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