Chlorine Facts Quiz

Chlorine gas is a yellowish green color.

Chlorine is an example of a halogen. Other halogens include fluorine and bromine.

The atomic number of chlorine is 17.

Chlorine’s element symbol is Cl.

Yes, there are 2 stable isotopes for the element chlorine.

Chlorine gets its name from its distinctive color.

The reason chlorine is added to water is because it is a potent oxidizing agent that helps kill bacteria and other pathogens.

Oxygen and hydrogen are the most abundant elements in the ocean (for water), although hydrogen does not account for much mass, compared to heavier elements. Sodium chloride (salt) is the next most abundant compound in seawater, so chlorine is the 3rd most common element.

Chlorine gas is heavier than air, so it sinks. Escape exposure to the gas by seeking higher ground/avoiding low-lying areas.

Chlorine may be produced by electrolysis of salt.