Cl vs Cl2

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Eileen Quach Discussion 2J
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Joined: Wed Sep 30, 2020 9:49 pm

Cl vs Cl2

Postby Eileen Quach Discussion 2J » Wed Oct 28, 2020 6:01 pm

When a questions says chlorine gas instead of chlorine, does that mean we write Cl2 instead of Cl? Also, do we do this everytime we see the word "gas"? For example, if the problem says oxygen gas, would we write O2 instead of O?

Stuti Pradhan 1B
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Re: Cl vs Cl2

Postby Stuti Pradhan 1B » Wed Oct 28, 2020 6:04 pm

Yes, chlorine gas is Cl2. There are 7 diatomic molecules (H,O,N,Cl,Br,I,F), so whenever these are gases or "exist naturally", you should use the subscript 2.

Hope this helps!

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Re: Cl vs Cl2

Postby SainehaMaddineni_2D » Wed Oct 28, 2020 6:07 pm

Yes, Cl2 is the correct way if it says chlorine gas. Oxygen would also be O2. This is because these elements exist as diatomic molecules.

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