How many valence electrons does Oxygen have?

What is the valency of oxygen(O) Valence electrons

The eighth element in the periodic table is oxygen (O), and its symbol is “O”.

The standard atomic weight of oxygen is 15.99903.

Oxygen is a chemical element that is essential to life. It makes up about 21% of the air we breathe, and it’s found in every living organism. Oxygen plays a vital role in our bodies, as it helps us to convert food into energy, and it also helps us to get rid of waste products.

Oxygen has been around since the beginning of time, but it wasn’t until 1774 that swedish chemist carl wilhelm scheele discovered oxygen’s properties. Since then, scientists have been able to use oxygen for various purposes such as medical treatments and industrial production processes.

Oxygen is also an important part of our environment. It helps plants to produce energy from sunlight through photosynthesis, and it can help clean up pollutants from water or air when used in wastewater treatment plants or smokestack scrubbers.

In short, oxygen is an essential chemical element that plays a major role in sustaining life on earth. Without this amazing element, life as we know it would not exist!

Oxygen element


Oxygen is one of the most important elements on earth, and its history is fascinating. Oxygen was discovered in 1774 by swedish chemist carl wilhelm scheele. He initially called it «fire air» because he observed that when heated, it produced a flame. He also found that when combined with other elements, it would form compounds such as water and carbon dioxide.

In 1778, english chemist joseph priestley identified oxygen as an element and named it «dephlogisticated air» or «vital air» because he believed that oxygen was necessary for life. In 1783, french chemist antoine lavoisier gave oxygen its modern name after recognizing its role in combustion reactions.

Today, we know that oxygen is essential to all life on earth. It makes up 21% of the atmosphere and is used by plants during photosynthesis to produce energy from sunlight and carbon dioxide. Animals use oxygen to convert food into energy through respiration while microbes use it for their metabolic processes like fermentation and decomposition of organic matter.

Oxygen has been used in a variety of industrial processes such as steel production, welding, rocket fuel production, water treatment, and even medical treatments like hyperbaric chambers for deep sea divers suffering from decompression sickness or carbon monoxide poisoning victims who require extra oxygen to recover quickly from their injuries or illness.

The history of oxygen is fascinating and has enabled us to better understand our environment and how we can use this essential element for our benefit today!


In nature, oxygen is used by plants to create energy through photosynthesis. This process helps to create food for animals and humans alike. Oxygen also helps to break down organic matter into simpler forms so that other organisms can use it as a source of nutrition.

Oxygen has many uses for humans as well. It is used in medical settings, such as when patients need additional oxygen during surgery or when they have difficulty breathing due to asthma or other respiratory problems. Oxygen can also be used industrially, such as in welding and metalworking processes where it helps to create strong bonds between materials.

Oxygen is also used in combustion processes such as burning fuels like gasoline and coal which produce heat energy that can be utilized for various purposes including powering engines and generating electricity. Finally, oxygen can be found in many products we use on a daily basis such as shampoos, detergents, paints and more which help us live healthier lives by removing bacteria from our environment or providing us with vibrant colors on our clothes or walls.

Position of Oxygen in the periodic table

Position of Oxygen in the periodic table

Biological role

Oxygen is a key component of respiration and photosynthesis, two of the most important processes in biology. During respiration, oxygen helps to convert glucose into energy; without it, cells would not be able to produce the energy they need for survival. Photosynthesis also relies on oxygen; plants use this element to turn light energy into food that can be used by other organisms.

In addition to its roles in metabolism and photosynthesis, oxygen has many other uses in biology. It helps regulate body temperature and ph levels and is necessary for nitrogen fixation and other biochemical processes. Oxygen also plays an important role in the immune system; its presence helps white blood cells fight bacteria and viruses more effectively.

Natural abundance

Oxygen is an essential element for life on earth, and it is found in abundance in our atmosphere. Oxygen makes up 21% of the air we breathe, making it the most abundant chemical element in the atmosphere. Oxygen is also found in water, rocks, and even soil.

Oxygen has many uses beyond just sustaining life on earth. It can be used to produce energy through combustion or as a reactant with other elements to form compounds such as carbon dioxide and ozone. Oxygen can also be used for medical purposes such as respiration therapy or sterilization of medical equipment.

The abundance of oxygen on earth makes it a vital resource for both humans and other living organisms. Without oxygen, life would not exist as we know it today. This is why it’s important to take steps to protect this valuable resource and ensure that its natural abundance continues into the future.

The environmental effects of oxygen

On the positive side, oxygen helps to create a healthy atmosphere for living things by acting as an oxidizing agent in chemical reactions. This means it helps to break down pollutants, such as carbon dioxide, into less harmful substances like water and carbon monoxide. Oxygen also helps to reduce air pollution by reducing levels of nitrogen oxides and sulfur dioxide in the atmosphere.

On the negative side, oxygen can be damaging if it is present in excessive amounts or if it reacts with other chemicals in an uncontrolled way. For example, when oxygen reacts with organic matter such as oil or gasoline, it can create smog and other air pollutants that can be hazardous to human health. In addition, too much oxygen can have an adverse effect on aquatic life by causing algal blooms or eutrophication — a process where excessive nutrients cause algae to grow rapidly and deplete oxygen levels in water bodies.

Isolation of Oxygen

Scheele was able to isolate oxygen after discovering that heating certain compounds could release a gas he called «fire air.» he noticed that this gas was heavier than regular air, and he concluded that it must be composed of something different. After further experiments, scheele determined that fire air was actually composed of two gases: oxygen and nitrogen.

Since then, several methods have been developed for isolating oxygen from other elements. One method involves distilling liquid air until only the purest form of oxygen is left behind; another involves using a device called an electrolyzer to separate out pure oxygen molecules from other gases in the atmosphere.

The isolation of oxygen has been incredibly important for our understanding of chemistry and biology, as well as our ability to use this vital element for various industrial applications such as welding and fuel production. Without scheele’s discovery over 200 years ago, many aspects of modern life wouldn’t be possible today!

atomic number8
atomic weight15.9994
boiling point−183.0 °C (−297.4 °F)
melting point −218.4 °C (−361.1 °F)
density (1 atm, 0 °C)1.429 g/litre
oxidation states−1, −2, +2 (in compounds with fluorine)
electron config.1s22s22p4

Health consequences of oxygen

Oxygen enters our bodies through the lungs and circulates throughout the bloodstream. In normal amounts, oxygen helps to keep us healthy by providing energy to cells and helping them to function properly. However, when too much oxygen enters the body, it can cause oxidative stress which can lead to cell damage and disease.

Oxidative stress has been linked to a variety of diseases such as cancer, heart disease, alzheimer’s disease, diabetes and more. It can also cause premature aging due to free radical damage caused by excess oxygen in the body. To reduce oxidative stress in your body you should aim for a balanced intake of oxygen through breathing exercises or even yoga practices that focus on deep breathing techniques.

In addition to oxidative stress caused by excessive levels of oxygen in the body, there are other health risks associated with an imbalance of this essential element. For example, low levels of oxygen have been linked to fatigue and difficulty concentrating while high levels have been linked with anxiety and depression-like symptoms.

It is important for us all to be aware that too much or too little oxygen can have serious health consequences on our bodies over time if not addressed properly through diet or lifestyle changes such as deep breathing exercises or yoga practices that focus on proper breathing techniques. By understanding how our bodies respond to different levels of this essential chemical element we can better protect ourselves from potential health risks associated with an imbalance of oxygen in our bodies.

Oxygen Compounds

The reactive element oxygen is highly reactive. The noble gases Helium, and neon is the only element oxygen doesn’t form compounds with. This is due to their incredible stability.

  • H2O – water
  • Al2O – aluminum oxide (in corundum and bauxite)
  • Carbon Dioxide (product from respiration) – CO2
  • C2H4O Ethyleneoxid (used for antifreeze production)
  • Fe2O3 Iron(III) Oxide (rust).
  • SiO2 – Silicon dioxide (found in granite or sand).
  • CaCO3. – Calcium Carbonate (in silicates and limestone)

What are the valence electrons for oxygen (O)?

Non-metallic elements include oxygen. Oxygen belongs to group 16. The valence electron refers to the number of electrons remaining in the last orbit. The valence electrons are the total number of electrons remaining in the shell after the electron configuration is oxygen(O). The properties of an element are determined by the valence electrons. They also participate in the formation bonds. The electron configuration for oxygen shows that the final shell contains six electrons. This site has an article that explains the electron configuration for oxygen. You can read it if desired.

What are the valence electrons for oxygen (O)

What number of electrons, protons, and neutrons does the oxygen (O) atom contain?

The nucleus can be found in the middle of an atom. The nucleus is home to protons and neutrons. The atomic number of oxygen 8 The number of protons in the oxygen is called the atomic number. The number of protons found in oxygen is 8. The nucleus contains an electron shell that is equal to the protons. This means that oxygen atoms contain a total eight electrons.

The difference between the number atomic masses and number of elements is what determines the number or neutrons within an element. This means that neutron number (n) = atomic mass (A) + atomic number (Z).

We know that the atomic quantity of oxygen (O) is 8 and that the atomic mass number for O is 16 (15.999). Neutron (n) = 16 – 8 = 8. The number of neutrons found in oxygen (O) is therefore 8.

Valence is the ability of an atom of a chemical element to form a certain number of chemical bonds with other atoms. It takes values from 1 to 8 and cannot be equal to 0. It is determined by the number of electrons of an atom spent to form chemical bonds with another atom. The valence is a real value. Numerical values of valence are indicated with roman numerals (I,II, III, IV, V, VI, VII, VIII).

How can you determine the number of valence elements in an oxygen (O) atom?

These are the steps to determine the valence electron. One of these is the electron configuration. Without an electron configuration, it is impossible to determine the valence of any element. It is easy to determine the valence of any element by knowing the electron configuration. This article contains details about the electron configuration. You can find it here. This article focuses on electron configuration.

However, it is possible to identify valence electrons by placing electrons according the Bohr principle. We will now learn how to identify the valence electron for oxygen.

Calculating the number of electrons in oxygen (O)

First, we must know the number of electrons within the oxygen atom. You need to know how many protons are in oxygen to determine the number electrons. To know the number protons, you must know the atomic number for the oxygen (O) element. A periodic table is required to determine the atomic number. The periodic table contains the information necessary to determine the atomic numbers of the oxygen elements.

The number of protons is called the atomic number. The nucleus also contains electrons that are equal to protons. This means that electrons are equal to the atomic numbers in an oxygen atom. The atomic number for oxygen can be seen in the periodic table at 8. This means that an oxygen atom contains eight electrons.

The terms “oxidation degree” and “valence” may not be the same, but they are numerically almost identical. The conditional charge of an atom’s atom is called the oxidation state. It can be either positive or negative. Valence refers to the ability of an atom form bonds. It cannot have a negative value.

You will need to perform electron configurations of oxygen (O)

Important step 2 This step involves arranging the electrons of oxygen. Eight electrons are the total number of oxygen atoms. The electron configuration of oxygen shows there are six electrons in the L shell, and two in the K shell.

This means that the first oxygen shell has two electrons and the second has six. The electron configuration of oxygen through sub-orbit is 1s2 2s2 2p4.

Calculate the total electrons and determine the valence shell

The third step is to determine the valence. The valence shell is the last shell after the electron configuration. A valence electron is the total number of electrons found in a valenceshell. The electron configuration of oxygen indicates that the last oxygen shell has six electrons (2s2 2p4). The valence electrons for oxygen are therefore six.

  1.  The valence is a numerical characteristic of the ability of atoms of a given element to bond with other atoms.
  2. The valence of hydrogen is constant and equal to one.
  3. The valence of oxygen is also constant and equal to two.
  4. The valence of most of the other elements is not constant. It can be determined by the formulas of their binary compounds with hydrogen or oxygen.

Compound formation of oxygen using valence electrons

Through its valence electrons, oxygen participates in the formation bonds. This valence electron is involved in the formation bonds with other elements’ atoms. By sharing electrons with hydrogen, oxygen atoms can form bonds.

Compound formation of oxygen by valence electrons

The electron configuration for hydrogen indicates that hydrogen only has one electron. Water(H2O) compounds are made by two hydrogen atoms and one oxygen atom. The oxygen atom then completes its octave, and gains the electron configuration of neon.

Hydrogen, on the other hand acquires the electronic configuration of Helium. Covalent bonding allows an oxygen atom to share electrons with two hydrogen molecules to form the H2O (water) compound.

How many valence electrons does oxygen ion(O2-) have?

The electron configuration has revealed that the last shell of an oxygen atom contains six electrons. It is evident that the last shell of an oxygen atom contains six electrons after arranging them. The valence electrons for oxygen in this instance are 6. This is what we know. During bond formation, the elements with 5, 6, or 7 electrons in their last shell (orbit) receive electrons from the shell that contains them. Anions are elements that have electrons and can form bonds. Oxygen, for example, is an anion element.

How many valence electrons does oxygen ion(O2-) have

The last shell receives electrons during the formation of oxygen bonds and transforms them into oxygenions (O2-). The electron configuration for oxygen ions is 1s2 2s2 2p6. The electron configuration of oxygenions shows that oxygen has two shells, while the second shell contains eight electrons. The electron configuration indicates that the oxygen ion is now and has the electron configuration of neon . In this instance, the valence for oxygen ions is -2. The valence electrons for oxygen ions (O2) have eight electrons in their last shell.

What is the valency for oxygen (O)?

Valency (or valence) is the ability of an element’s atom to join another atom in the formation of a molecule. The valency is the number of unpaired electrons found in an element’s last orbit. O*(8) is the electron configuration of oxygen when it’s excited. It’s O*(8) = 1s2s2 2px2 2py1 2pz1.

The electron configuration of oxygen (O) indicates that there are two unpaired electrons within the last orbital.

What is the valency of oxygen(O)

The valency of oxygen is therefore 2.


  • Atomic Symbol (on Periodic Table of Elements: O
  • 8. Atomic Number (number protons in the nucleus).
  • The average mass of an atom is called the atomic weight. It is 15.9994
  • Phase at Room Temperature – Gas
  • O-16 is the most common isotope (99.757 per cent natural abundance).
  • Melting Point: minus 361.82 degrees Fahrenheit (minus 218.79 degrees Celsius)
  • Density: 0.001429 g per cubic centimeter
  • Boiling Point: minus 297.31 degrees F (minus 182.95 degrees C)
  • Number of stable isotopes (atoms with different numbers of neutrons from the same element): 11; Three



Alexander Stephenson

Candidate of Chemical Sciences, editor-in-chief of Lecturer at several international online schools, member of the jury of chemistry competitions and author of scientific articles.

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