Chlorine (Cl), element 17 – Learn Acer periodic table

Nonmetal, atomic number 17.

Chlorine is a chemical element with symbol Cl and atomic number 17. It also has a relative atomic mass of 35.5. Chlorine is in the halogen group (17) and is the second lightest halogen following fluorine.

Symbol Cl. Atomic mass 35.45 u. Group 17, period 3. Electron configuration [Ne] 3s2 3p5. Electrons per shell 2, 8, 7. State at room temperature: Gas. Melting point -101.5 °C, boiling point -34.0 °C. Discovered by Carl Wilhelm Scheele.

Element data from Wikipedia, CC BY-SA 3.0.

Chlorine (Cl), element 17 – Learn Acer periodic table

Chlorine

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