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Fluorine is a pale yellow gas and very reactive.

Chlorine is a pale green - which could look yellow depending on the lighting. it too is highly reactive.

Of the two, you would probably be looking for fluorine as the best answer.

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Related Questions

What is a halogen gas with the mass less than 15?

The halogen gas with a mass less than 15 is fluorine (F). It has an atomic mass of approximately 19.00 u, but if considering only the halogen gases, it is the lightest halogen. Fluorine is a pale yellow gas at room temperature and is highly reactive, particularly with alkali and alkaline earth metals.


What element is green and yellow gas and is a halogen?

Chlorine . The name comes the Classical Greek for Green , Chloros. We also have the word ' chlorphyll' for a green organic chemical .


What type of gas is in a tungsten-halogen light bulb?

Halogen gas is in a Tungsten-Halogen Light Bulb.


What gas is found in halogen lamps?

Halogen.


What gas is a halogen filled with?

Halogen is a gas, so your question doesn't make much sense. If you're asking about a halogen (light) bulb, then the answer is: mainly halogen.


Is fluorine a physical of chemical substance?

Fluorine is a chemical substance - a halogen.


Is AR a halogen?

Argon is a noble gas. It is not a halogen. Fluorine is a example for that.


What is the purpose of halogen gas in a tungsten-halogen lamp?

The purpose of halogen gas in a tungsten-halogen lamp is to increase the lifespan and efficiency of the lamp. The halogen gas helps to recycle evaporated tungsten back onto the filament, preventing blackening of the glass and extending the life of the lamp.


What is an element that is a Halogen Gas and with a mass less than 15?

No halogen gas has a mass of under 15 atomic mass units. The closest is fluorine, at 19.0 atomic mass units.


Which is a filling gas that's used in tungsten-halogen lamps?

That'd be Halogen.


Which halogen goes from the solid phase directly to a gas?

Iodine is the halogen that sublimes directly from a solid to a gas at standard pressure and temperature.


What is the name of substance f2?

If you mean the name of the element with the symbol F, it is Flourine