Chemical Elements.com – Chlorine (Cl)


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Basic Information

Name: Chlorine

Symbol: Cl

Atomic Number: 17

Atomic Mass: 35.4527 amu

Melting Point: -100.98 °C (172.17 K, -149.764 °F)

Boiling Point: -34.6 °C (238.55 K, -30.279997 °F)

Number of Protons/Electrons: 17

Number of Neutrons: 18

Classification: Halogen

Crystal Structure: Orthorhombic

Density @ 293 K: 3.214 g/cm3
Color: green

Atomic Structure

[Bohr Model of Chlorine]  
Number of Energy Levels: 3
    First Energy Level: 2

    Second Energy Level: 8

    Third Energy Level: 7


Isotope Half Life
Cl-35 Stable
Cl-36 301000.0 years
Cl-37 Stable
Cl-38 37.2 minutes



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