Element Chlorine - Cl
The next six electrons will go in the 2p orbital. The p orbital can hold up to six electrons. We'll put six in the 2p orbital and then put the next two electrons in the 3s. Since the 3s if now full we'll move to the 3p where we'll place the remaining five electrons. Therefore the Chlorine electron configuration will be 1s 2 2s 2 2p 6 3s 2 3p 5. Carbon has four valence electrons, Hydrogen has one valence electrons and like all halogens, Chlorine has seven valence electrons. Total number of Valence electrons = 4 + 2.1 + 2.7 = 4+2+14 = 20. There are twenty valence electrons in the compound, and four bonds are formed. Central carbon atom forms two bonds with both Hydrogen and Chlorine atoms. The total number of electrons present in the valence shell of an atom are called valence electrons, and there are a total of seven electrons present in the valence shell of chlorine (3s²3p⁵). Thus, chlorine has seven valence electrons.
Valence Electrons: 3s 2 p 5 Electron Dot Model. Chlorine - Cl (EnvironmentalChemistry.com)- Comprehensive information for the element Chlorine - Cl is. The electron configuration of chlorine is 1s22s22p63s23p5 or Ne3s23p5. The 3s23p5 electrons are the outermost electrons, so chlorine has seven valence electrons. In a picture, the valence electrons are the ones in the outermost shell. You can see in the diagram below that there are seven electrons in the outermost circle.
Comprehensive data on the chemical element Chlorine is provided on this page; including scores of properties, element names in many languages, most known nuclides of Chlorine. 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.
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Overview of Chlorine
- Atomic Number: 17
- Group: 17
- Period: 3
- Series: Halogens
Chlorine's Name in Other Languages
- Latin: Chlorum
- Czech: Chlor
- Croatian: Klor
- French: Chlore
- German: Chlor - r
- Italian: Cloro
- Norwegian: Klor
- Portuguese: Clóro
- Russian: Хлор
- Spanish: Cloro
- Swedish: Klor
Atomic Structure of Chlorine
- Atomic Radius: 0.97Å
- Atomic Volume: 22.7cm3/mol
- Covalent Radius: 0.99Å
- Cross Section (Thermal Neutron Capture)σa/barns: 35.5
- Crystal Structure: Orthorhombic
- Electron Configuration:
- 1s2 2s2p6 3s2p5
- Electrons per Energy Level: 2,8,7
- Shell Model
- Shell Model
- Ionic Radius: 1.81Å
- Filling Orbital: 3p5
- Number of Electrons (with no charge): 17
- Number of Neutrons (most common/stable nuclide): 18
- Number of Protons: 17
- Oxidation States:±1,3,5,7
- Valence Electrons: 3s2p5
- Electron Dot Model
- Electron Dot Model
Chemical Properties of Chlorine
- Electrochemical Equivalent: 1.3228g/amp-hr
- Electron Work Function:
- Electronegativity: 3.16 (Pauling); 2.83 (Allrod Rochow)
- Heat of Fusion: 3.203kJ/mol
- Incompatibilities:
- Reacts explosively or forms explosive compounds with many common substances such as acetylene, ether, turpentine, ammonia, fuel gas, hydrogen & finely divided metals.
- Ionization Potential
- First: 12.967
- Second: 23.81
- Third: 39.611
- Valence Electron Potential (-eV): -7.96
Chlorine Valence Electrons
Physical Properties of Chlorine
- Atomic Mass Average: 35.4527
- Boiling Point: 239.25K -33.9°C -29°F
- Coefficient of lineal thermal expansion/K-1: N/A
- Conductivity
- Electrical:
Thermal: 0.000089 W/cmK
- Electrical:
- Density: 3.214g/L @ 273K & 1atm
- Description:
- Yellow-green halogen gas.
- Elastic Modulus:
- Bulk: 1.1/GPa
- Enthalpy of Atomization: 121.8 kJ/mole @ 25°C
- Enthalpy of Fusion: 3.38 kJ/mole
- Enthalpy of Vaporization: 10.21 kJ/mole
- Flammablity Class: Non-flammable gas (strong oxidizer)
- Freezing Point:see melting point
- Heat of Vaporization: 10.2kJ/mol
- Melting Point: 172.31K -100.84°C -149.51°F
- Molar Volume: 18.7 cm3/mole
- Optical Refractive Index: 1.000773
- Physical State (at 20°C & 1atm): Gas
- Specific Heat: 0.48J/gK
- Vapor Pressure = 1300kPa
Chlorine Valence Electrons Amount
Regulatory / Health
Chlorine Valence Electrons Gain Or Lose
- CAS Number
- 7782-50-5
- UN/NA ID and ERG Guide Number
- UN1017 / 124
- RTECS: F02100000
- NFPA 704
- Health:
- Fire:
- Reactivity:
- Special Hazard: OxidizerOSHAPermissible Exposure Limit (PEL)
- 1 ppm = 2.9mg/m3 @ 25°C & 1 atm
- Ceiling: 1 ppm
- OSHA PEL Vacated 1989
- TWA: 0.5 ppm
- STEL: 1 ppm
- NIOSHRecommended Exposure Limit (REL)
- Ceiling: 0.5 ppm
- IDLH: 10 ppm
- Routes of Exposure: Inhalation; Skin and/or eye contact
- Target Organs: Eyes, skin, respiratory system
- 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: 2890
- Bone/p.p.m: 900
- Liver/p.p.m: 3000-7200
- Muscle/p.p.m: 2000-5200
- Daily Dietary Intake: 3 - 6.5 g
- Total Mass In Avg. 70kg human: 95 g
Who / Where / When / How
- Discoverer: Carl Wilhelm Scheele
- Discovery Location: Uppsala Sweden
- Discovery Year: 1774
- Name Origin:
- Greek: khlôros (green).
- Abundance of Chlorine:
- Earth's Crust/p.p.m.: 130
- Seawater/p.p.m.: 18000
- Atmosphere/p.p.m.: N/A
- Sun (Relative to H=1E12): 320000
- Sources of Chlorine:
- Never found in free form in nature. Salt (sodium chloride, NaCl) is its most common compound. World wide production is around 168,000,000 tons per year. There are vast mining deposits in USA, Poland, Russia, Germany, China, India and Australia.
- Uses of Chlorine:
- Used in water purification, bleaches and in other compounds such as chloro fluorocarbons (CFC).
- Additional Notes:
- WARNING: Chlorine gas is extremely dangerous and Chlorine should NEVER be mixed with ammonia.
Chlorine Menu
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References
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.
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