Bromine Valence Electrons

Posted on  by admin
  1. Bromine Valence Electron Configuration
  2. Bromine Number Of Valence Electrons
  3. Bromine Valence Electrons Need
  4. Bromine Valence Electrons And Ion

Drawing the Lewis Structure for CBr4 (Carbon Tetachloride)

Viewing Notes:

The valence of an atom refers to the number of electrons in the outer most shells. The electron configuration of Bromine is 1s22s22p63s23p64s23d104p5 and the outer most shells are the 4s and 4p orbitals. There are two electrons in the former, five in the latter for a total of seven valence electrons. Bromine pentafluoride can be formed either by (1) the direct reaction of bromine with excess fluorine above 150 °C or by (2) the reaction of BrF3 vapor and gaseous fluorine at 200 °C. Frim R, Ukeles SD; Bromine, Inorganic Compounds.

  • The Lewis structure for CBr4 is similar to CCl4. Since they are in the same Group on the periodic table they each have the same number of electrons (7) their structures are similar.
  • The Carbon atom goes in the center of the Lewis structure since it is the least electronegative.
  • For the CBr4 Lewis structure there are a total of 32 valence electrons available.

See the Big List of Lewis Structures

Transcript: This is the CBr4 Lewis structure: Carbon Tetrabromide. Carbon is in group 4 or 14, so it has 4 valence electrons. Bromine in group 7 or 17, so it has 7, and we have 4 Bromines. So 4 plus 28 equals 32 total valence electrons. Carbon, that's the least electronegative, that'll go in the center; and on the outside we'll put the Bromine atoms. We'll put 2 electrons between atoms to form chemical bonds, and we've used 8.

And then we'll go around the outside and fill the octets for the Bromine until we've used 32 valence electrons. So we have 8, 10, 12, and 32. So we've used all 32 valence electrons. Each of the Bromines has 8 valence electrons, and the central Carbon has 8 valence electrons as well.

So this is the correct structure for CBr4. This is Dr. B.

Element Bromine - Br

Comprehensive data on the chemical element Bromine is provided on this page; including scores of properties, element names in many languages, most known nuclides of Bromine. Common chemical compounds are also provided for many elements. In addition technical terms are linked to their definitions and the menu contains links to related articles that are a great aid in one's studies.

Bromine Valence Electrons

Bromine Menu

  • Bromine Page One
  • Bromine Page Two
  • Bromine Page Three

Overview of Bromine

  • Atomic Number: 35
  • Group: 17
  • Period: 4
  • Series: Halogens

Bromine's Name in Other Languages

  • Latin: Bromum
  • Czech: Brom
  • Croatian: Brom
  • French: Brome
  • German: Brom - r
  • Italian: Bromo
  • Norwegian: Brom
  • Portuguese: Bromo
  • Russian: Бром
  • Spanish: Bromo
  • Swedish: Brom

Atomic Structure of Bromine

  • Atomic Radius: 1.12Å
  • Atomic Volume: 23.5cm3/mol
  • Covalent Radius: 1.14Å
  • Cross Section (Thermal Neutron Capture)σa/barns: 6.8
  • Crystal Structure: Orthorhombic
  • Electron Configuration:
    1s2 2s2p6 3s2p6d10 4s2p5
  • Electrons per Energy Level: 2,8,18,7
    Shell Model
  • Ionic Radius: 1.96Å
  • Filling Orbital: 4p5
  • Number of Electrons (with no charge): 35
  • Number of Neutrons (most common/stable nuclide): 45
  • Number of Protons: 35
  • Oxidation States:±1,5
  • Valence Electrons: 4s2p5
    Electron Dot Model

Chemical Properties of Bromine

  • Electrochemical Equivalent: 2.9812g/amp-hr
  • Electron Work Function:
  • Electronegativity: 2.96 (Pauling); 2.74 (Allrod Rochow)
  • Heat of Fusion: 5.286kJ/mol
  • Incompatibilities:
    combustible organics (sawdust, wood, cotton, straw, etc.), oxidizable material, aqueous ammonia, hydrogen, acetylene, phosphorus, aluminum, titanium, mercury, potassium, other metals.
  • Ionization Potential
    • First: 11.814
    • Second: 21.8
    • Third: 36
  • Valence Electron Potential (-eV): -7.35

Physical Properties of Bromine

  • Atomic Mass Average: 79.904
  • Boiling Point: 332.4K 59.25°C 138.65°F
  • Coefficient of lineal thermal expansion/K-1: N/A
  • Conductivity
    Thermal: 0.00122 W/cmK
  • Density: 3.119g/cc @ 300K
  • Description:
    Heavy, red-brown, fuming liquid with a choking, irritating odor; causes tears
  • Elastic Modulus:
    • Bulk: 1.9/GPa
  • Enthalpy of Atomization: 111.7 kJ/mole @ 25°C
  • Enthalpy of Fusion: 5.29 kJ/mole
  • Enthalpy of Vaporization: 15.46 kJ/mole
  • Flammablity Class: Noncombustible Liquid
  • Freezing Point:see melting point
  • Heat of Vaporization: 15.438kJ/mol
  • Melting Point: 266.05K -7.1°C 19.2°F
  • Molar Volume: 25.62 cm3/mole
  • Optical Refractive Index: 1.001132
  • Physical State (at 20°C & 1atm): Liquid
  • Realitive Gas Density (Air=1) = 5.51
  • Specific Heat: 0.473J/gK
  • Vapor Pressure = [email protected]°C

Regulatory / Health

  • CAS Number
    • 7726-95-6
  • UN/NA ID and ERG Guide Number
    • 1744 / 154
  • RTECS: EF9100000
  • NFPA 704
    • Health: 4
    • Fire:
    • Reactivity:
    • Special Hazard:
  • OSHAPermissible Exposure Limit (PEL)
    • 1 ppm = 6.54mg/m3 @ 25°C & 1 atm
    • TWA: 0.1 ppm
  • OSHA PEL Vacated 1989
    • TWA: 0.1 ppm
    • STEL: 0.3 ppm
  • NIOSHRecommended Exposure Limit (REL)
    • TWA: 0.1 ppm
    • STEL: 0.3 ppm
    • IDLH: 3 ppm
  • Routes of Exposure: Inhalation; Ingestion; Skin and/or eye contact
  • Target Organs: Respiratory system, eyes, central nervous system, skin
  • Levels In Humans:
    Note: this data represents naturally occuring levels of elements in the typical human, it DOES NOT represent recommended daily allowances.
    • Blood/mg dm-3: 4.7
    • Bone/p.p.m: 6.7
    • Liver/p.p.m: 0.2-7
    • Muscle/p.p.m: 7.7
    • Daily Dietary Intake: 0.8-24 mg
    • Total Mass In Avg. 70kg human: 260 mg
Bromine valence electrons

Who / Where / When / How

  • Discoverer: Antoine J. Balard/ C. Löwig
  • Discovery Location: Montpellier France/Heidelberg Germany
  • Discovery Year: 1826
  • Name Origin:
    Greek: brômos (stench).
  • Abundance of Bromine:
    • Earth's Crust/p.p.m.: 0.37
    • Seawater/p.p.m.: 65
    • Atmosphere/p.p.m.: N/A
    • Sun (Relative to H=1E12): N/A
  • Sources of Bromine:
    Occurs in compounds in sea water, Dead Sea, natural brines and salt-lake evaporates. World wide production estimated to be around 330,000 tons per year. Main mining areas are USA, Israel, UK, Russia, France and Japan.
  • Uses of Bromine:
    Used for water purification (swimming pools), manufacture of ethylene dibromide (anti-knocking gasoline), bleaching, organic synthesis, solvent, analytical reagent, fire retardant for plastics, pharmaceuticals, shrink-proofing wool.
  • Additional Notes:

Bromine Valence Electron Configuration

Bromine Menu

  • Bromine Page One
  • Bromine Page Two
  • Bromine Page Three


A list of reference sources used to compile the data provided on our periodic table of elements can be found on the main periodic table page.

Related Resources

  • Anatomy of the Atom
    Answers many questions regarding the structure of atoms.
  • Molarity, Molality and Normality
    Introduces stoichiometry and explains the differences between molarity, molality and normality.
  • Molar Mass Calculations and Javascript Calculator
    Molar mass calculations are explained and there is a JavaScript calculator to aid calculations.
  • Chemical Database
    This database focuses on the most common chemical compounds used in the home and industry.

Citing this page

If you need to cite this page, you can copy this text:

Kenneth Barbalace. Periodic Table of Elements - Bromine - Br. 1995 - 2021. Accessed on-line: 4/24/2021

Bromine Number Of Valence Electrons

Linking to this page

If you would like to link to this page from your website, blog, etc., copy and paste this link code (in red) and modify it to suit your needs:

Bromine valence electrons need

<a href=''>echo Periodic Table of Elements: Bromine - Br (</a>- Comprehensive information for the element Bromine - Br is provided by this page including scores of properties, element names in many languages, most known nuclides and technical terms are linked to their definitions.

Bromine Valence Electrons Need


Bromine Valence Electrons And Ion

PLEASE, if you like an article we published simply link to it on our website do not republish it.