What number of valence electrons does Bromine (Br) possess?

What is the valency of bromine Valence electrons

Bromine is the 35th and final element on the periodic table. Bromine is the element of group-17. Its symbol, ‘Br”, is its symbol. Bromine, a halogen element, forms bonds using its electrons . This article will explain in detail how bromine’s valence electrons work. You will be able to learn more after you have read this article.

It is liquid at standard pressure and temperature conditions. Mercury is the only element that can be liquid in these conditions. Organobromine compounds easily dissociate at high temperatures to give free bromine atoms. This prevents free radical chemical chain reaction. This makes organobromine compounds effective as fire retardants. More than half of the world’s bromine is used for this purpose every year. This property also causes ultraviolet sunlight to cause volatile organobromine compound dissociation in the atmosphere to give free bromine atoms. Ozone depletion is caused by this same property. Many organobromine compounds, such as the pesticide methylbromide, are no longer being used. Bromine compounds can still be used in well drilling fluids and in photographic film. They also serve as intermediates in the production of organic chemicals.

Place of Bromine (Br) in the periodic table

Place of Bromine (Br) in the periodic table


Antoine Jerome Balard discovered bromine when he was looking at salt water from Montpellier (France). The concentrated brine residue that remained after the brine had evaporated was taken by Balard and he added chlorine gas to it. He then created an orange-red liquid and deduced that it was a new element. In 1826, he submitted a journal account detailing his findings to French Academy.


Bromine is used in many fields, such as chemical intermediates, dyestuffs and insecticides. Some uses have been discontinued for environmental reasons. However, there are still many new uses.

Bromine compounds are also used as flame retardants. These compounds are added to furniture foam, plastic cases for electronics, and textiles to make them less volatile. Due to toxic concerns, bromine has been eliminated as a flame retardant in the USA.

Organobromides can be found in halon fire extinguishers, which are used to control fires in places such as museums, aeroplanes, and tanks. Silver bromide can be used for film photography.

Biological function

Bromine is found in tiny amounts in all living things, including bromide. Bromine has no biological significance in humans. Bromine is irritating to the eyes, throat, and skin. It can also cause painful sores.

Health effects from bromine

Bromine vapors can cause eye and throat irritation and damage to tissue. Inhalation can make bromine vapors very toxic.

Organic bromines are easily absorbed by humans through their skin, food, and breathing. Organic bromines are used widely as pesticides against insects and other undesirable pests. However, they can be poisonous not just to the pests they are being used against, but also to larger mammals. Bromine-containing organic pollutants can cause serious health problems for humans.

What are the valences electrons of bromine

Bromine is non-metallic. The number of electrons within the shell after the last orbit is known as the valence. The valence of bromine is the sum of all electrons found in the shell following the electron configuration. The element’s properties are determined by the presence of valence electrons, which also play a role in bond formation.

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 do I calculate the number valence electrons within a bromine atom

Following a few steps, you can determine the valence of electrons. One of these steps is the electron configuration. Without the electron configuration, it’s impossible to determine valence electrons. It is simple to identify the electron configuration of all elements.

However, valence elements can be identified by organizing electrons according to Bohr principles. This is how we can determine the valence of bromine.

Finding the total number electrons in bromine

We first need to determine the total number electrons in the bromine-atom. The number of protons present in bromine is required to calculate the number of electrons. You will also need to know the atomic numbers of the elements of bromine to determine the number of electrons.

The periodic table can be used to calculate the atomic numbers. The periodic table has the information necessary to determine the atomic number for bromine elements. The number of protons in an atom is the atomic number. Additionally, electrons equal to protons can be found outside of the nucleus.

We can thus conclude that electrons are equal to the atomic numbers in the bromine-atom. We can see that the atomic amount of bromine is 35 from the periodic tables. The total number of electrons in a bromine atom is therefore 35.

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.

Bromine needs to be electron-configured

Important step 2. The arrangement of the electrons of bromine is required in this step. The total number of electrons in bromine atoms is thirty-five. The electron structure for bromine shows that there is two electrons inside the K shell. There are eight electrons in each of the L shells. Eighteen electrons are in the M shell. Seven electrons are in the N shell.

This means that the bromine shells have two electrons each, eight electrons in the second, eight in the third, eighteen electrons in the third, and seven electrons in the fourth. There are two shells of bromine with eight electrons each: 2, 8, 18 and 7.

Besides, do BR have 8 valences electrons?

Bromine contains 7 valance electrons. The rightmost column of the periodic table has 8 valance electrona or a complete shell.

How can you determine how many electrons it takes to fill the outer shell?

Bromine can be used for many purposes, including agricultural chemicals, dyestuffs. insecticides. Pharmaceuticals and chemical intermediates. While some uses have been discontinued due to environmental concerns, new uses can still be found. Bromine compounds may be used as flame retardants.

  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.

Calculate total electrons by determining the valenceshell

The third step involves diagnosing the valenceshell. The valenceshell is the shell that follows the electron configuration. The total number of electrons contained in a Valence Shell is called valence. The electron configuration indicates that the last bromine shell has seven electrons. Bromine’s valence electrons (Br), are therefore seven.

How do you calculate the number of valence electrons in a bromine atom

What is the valency for bromine?

Valency is the ability for an element’s one atom to bond with another during the formation a molecule. The element’s valency refers to the number of electrons that remain unpaired in its last orbit. Bromine(Br), in its correct electron configuration, will be 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4px2 4py2 4pz1.

This electron configuration shows that the bromine atom’s last shell contains an unpaired electron. Bromine’s valency is therefore 1. The electron configuration of an element in its excited state determines its valency. Bromine atoms absorb energy when they are excited. A bromine atom in the 4py sub-orbital is excited and then jumps to its 4dxy1 orbital.

What is the valency of bromine

The electron configuration of bromine (Br*), in excited state, will therefore be 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4px2 4py1 4pz1 4dxy1. Bromine is composed of three unpaired electrons. Bromine’s valency in this instance is 3. Bromine atom can be found in -1, 1, +1, +3, or +5 oxidation states. The bond formation can affect the oxidation status of an element.

How many protons or electrons does bromine possess?

The nucleus is located at the center of an atom. In the nucleus are protons and neutrons. 35 is the atomic quantity of bromine. The number protons is what the atomic number refers to. This means that the number protons in bromine equals thirty-five. A circular shell is located outside of the nucleus and contains electrons equal to protons. A bromine atom can have up to thirty-five electrons.

How many orbitals does BR possess?

Let’s look at the bromine atom to understand this principle. Bromine (Z=35), with 35 electrons can be found in Period 4 Group VII of the periodic tables. Bromine is 7 valence electrons so the 4s orbital with 2 electrons will be filled. The remaining 5 electrons will then occupy the 4p orbital.

Why use noble gas notation?

noble gases is that uses to summarise the electron configuration for an element and provide the most pertinent information about the element’s valence electrons. To represent all electrons not valence electrons, the noble gases can be substituted.

How many valence elements does bromine (Br ) contain?

During bond formation, the elements with 5, 6, and 7 electrons in their last shells are able to receive electrons from the last shell. Anions are the elements that receive electrons to form bonds. Bromine’s last shell receives an electron when it forms a bond. This is called a bromide Ion (Br ). This is why bromine is called an anion element.

How many valence electrons does bromine ion(Br–) have

Bromide Ion’s electron configuration (Br) is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6. The electron configuration shows the bromide-ion (Br ) has obtained the configuration of krypton. The eight electrons in the last bromine ion shell indicate that the valence electrons are eight for the bromine electron ion (Br ).

How can you gain or lose electrons?

When atoms are deprived of electrons or gain electrons they become what is called an ion. An atom that loses electrons has a net negative charge. This is known as a cation. Loss of electrons causes an atom to have a net negative charge. The atom is known as an anion.

How many electrons does bromine have?

A bromine atom has 35 electrons. A bromide-ion (Br) has 36 electrons.

How many inner electrons has Br?


What is the number of electrons in a Br ion’s atom?


What are the valence electrons present in the element Br?




Alexander Stephenson

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

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