When we write the configuration we'll put all 17 electrons in orbitals around the nucleus of the Chlorine atom. In writing the electron configuration for Chlorine the first two electrons will go in the 1s orbital. Since 1s can only hold two electrons the next 2 electrons for Chlorine go in the 2s orbital.

• Chlorine Atomic Number
• Chlorine Atom Draw
• Chlorine Periodic Table
• Chlorine Atomic Radius

• Formula: Cl
• Molecular weight: 35.453
• IUPAC Standard InChI:
  

  InChI=1S/Cl Download the identifier in a file.

• IUPAC Standard InChIKey:ZAMOUSCENKQFHK-UHFFFAOYSA-N
• CAS Registry Number: 22537-15-1
• Chemical structure:
  This structure is also available as a 2d Mol file
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• Chlorine is a chemical element with the symbol Cl and atomic number 17. The second-lightest of the halogens, it appears between fluorine and bromine in the periodic table and its properties are mostly intermediate between them. Chlorine is a yellow-green gas at room temperature.
• Chlorine atom Please visit the Chlorine element page for information specific to the chemical element of the periodic table.
• Chlorine has two stable isotopes chlorine-35 and chlorine-37with Chlorine-35 accounting for roughly 3 out of every 4 naturally occurring chlorine atoms. Chlorine-36 is also known naturally and is a radioactive isotope with a half life of about 30,000 years.
• The total number of electrons in a chlorine atom is 17, which is also the atomic number of that element. Of those, 7 are outer (aka valence) electrons, having 3 as principal quantum number. The other 10 electrons, having principal quantum number l.

Gas phase thermochemistry data

Chlorine Atomic Number

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Data compilation copyrightby the U.S. Secretary of Commerce on behalf of the U.S.A.All rights reserved.

Gas Phase Heat Capacity (Shomate Equation)

C_p° = A + B*t + C*t² + D*t³ + E/t²
H° − H°_298.15= A*t + B*t²/2 + C*t³/3 + D*t⁴/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t²/2 + D*t³/3 − E/(2*t²) + G
C_p = heat capacity (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.

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References

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Chlorine Atom Draw

Data compilation copyrightby the U.S. Secretary of Commerce on behalf of the U.S.A.All rights reserved.

Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A.,CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. Videopad video editor code. [all data]

Chlorine Periodic Table

Chase, 1998
Chase, M.W., Jr.,NIST-JANAF Themochemical Tables, Fourth Edition,J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Notes

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Chlorine Atomic Radius

• Symbols used in this document:
  

  S°gas,1 bar	Entropy of gas at standard conditions (1 bar)
  ΔfH°gas	Enthalpy of formation of gas at standard conditions

• Data from NIST Standard Reference Database 69:NIST Chemistry WebBook
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