chlorine
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.
No halogen gas has a mass of under 15 atomic mass units. The closest is fluorine, at 19.0 atomic mass units.
The element with 18 protons and 22 neutrons is argon. Argon has an atomic number of 18, which corresponds to the number of protons, and an atomic mass of 40 (approx.), which is the sum of protons and neutrons.
An element with 22 neutrons could be titanium. Titanium has an atomic number of 22, which means it has 22 protons in its nucleus. Since the number of neutrons is the difference between the atomic mass and the atomic number, an isotope of titanium with 22 neutrons would have a mass number of 44 (22 protons + 22 neutrons).
18 protons 18 electrons 22 neutrons
Halogen gas is in a Tungsten-Halogen Light Bulb.
Halogen.
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.
Argon is a noble gas. It is not a halogen. Fluorine is a example for that.
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.
No halogen gas has a mass of under 15 atomic mass units. The closest is fluorine, at 19.0 atomic mass units.
The element with 18 protons and 22 neutrons is argon. Argon has an atomic number of 18, which corresponds to the number of protons, and an atomic mass of 40 (approx.), which is the sum of protons and neutrons.
That'd be Halogen.
There are 18, 20 or 22 neutrons.
Iodine is the halogen that sublimes directly from a solid to a gas at standard pressure and temperature.
An element with 22 neutrons could be titanium. Titanium has an atomic number of 22, which means it has 22 protons in its nucleus. Since the number of neutrons is the difference between the atomic mass and the atomic number, an isotope of titanium with 22 neutrons would have a mass number of 44 (22 protons + 22 neutrons).
No, it is a noble gas