Which atmospheric gas is being described a noble gas makes up approximately 1% of the atmosphere

Argon is the third noble gas, in period 8, and it makes up about 1% of the Earth's atmosphere.

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answer;

-chlorine

explanation;

-toxic industrial chemicals are industrial chemicals that are manufactured, stored, transported, and used throughout the world. toxic industrial chemicals can be in the gas, liquid, or solid state.

-they can be chemical hazards (e.g., carcinogens, reproductive hazards, corrosives, or agents that affect the lungs or blood) or physical hazards (e.g., flammable, combustible, explosive, or reactive).