Information valid for Cl-35 unless otherwise noted

Chlorine

Basic Information

Symbol: Cl
Atomic Number: 17
Mass: 35.4527
Melting Point: -100.98 C
Boiling Point: -34.6 C
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

Number of Energy Levels: 3 First Energy Level: 2 Second Energy Level: 8 Third Energy Level: 7

Isotopes

Facts

Date of Discovery: 1774
Discoverer: Carl Wilhelm Scheele
Name Origin: From the Greek word khlôros (green)
Uses: Water purification, bleaches
Obtained From: Salt

Related Links

Note: The external links below are not a part of this site and their content is not the responsibility of this site

1. Salt Institute

Information about sodium chloride (table salt)

2. Chlorine Chemistry Council

Designed to promote understanding of chlorine chemistry

3. HHMI Laboratory Safety: Chlorine

Information about the dangers of chlorine