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BNC: 47227 COCA: 40089

a chemical element that is a gas that does not react with other elements and is used in some types of lights and lasers

BNC: 47227 COCA: 40089
BNC: 47227 COCA: 40089
BNC: 47227 COCA: 40089
krypton
Gases: acetylene, ammonia, argon...

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