Chlorine
颁辞苍迟谤颈产耻迟辞谤:听Ms. Kim Amstutz's class from Clay High School
Chlorine gas-the first gas of warfare WWI.
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Symbol: Cl
Atomic Number: 17
Atomic Mass: 35.45 u
Electron Configuration:听[Ne] 3s23p5听
Year Discovered: 1774
Discovered By: Carl Wilhelm Scheele