Which nonmetals occur as monatomic gases

Which elements have only two electrons in their electrondot structures: hydr… Which elements have only two electrons in their electron- dot structures:… List the elements that exist as gases at room temperature.

Hint: Most of th… For each of the following nonmetals, how many electrons will each atom of th… Explain why the gaseous nonmetals exist as diatomic molecules, but other … Problem Which two elements exist as liquids at room tempe….

View Full Video Already have an account? Ronald P. Problem 22 Easy Difficulty Which nonmetals occur as monatomic gases i. Answer View Answer. Topics No Related Subtopics. Monoatomic metals are not to be confused with colloidal metals. Colloidal gold and silver are suspended particles or clumps of atoms. Colloids have been demonstrated to behave differently from the elements as metals. Actively scan device characteristics for identification. Use precise geolocation data. Select personalised content.

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Neon is also used in some underwater breathing mixtures; liquid neon is used in low-temperature cooling. Argon is a colorless, odorless, unreactive gas which liquefies at It is found in the Earth's crust at a concentration of 1.

Argon which is used commercially is extracted from liquid air by fractional distillation. Argon had been observed before by Henry Cavendish in , but it had not been identified as an element. Because of its unreactivity, it was named for the Greek word for "idle," argos.

When argon was discovered, it didn't fit with the reactivities of any other element on the periodic table, and chemists realized that there might be a whole family of previously-unrecognized elements, which we now recognize as Group 8A. Argon is used in light bulbs because it is inert to the hot metal of the bulb filament; the filament would burn out much faster in air or even pure nitrogen.

It is also used in metal refining, some "neon" lights argon produces a blue light , some food packaging to provide an inert atmosphere to reduce spoilage , in the tires of some luxury cars in place of air, and in lasers used in eye surgery. Argon is produced by the radioactive decay of potassium; the potassium nucleus undergoes electron capture to produce the stable argon nucleus.

The ratio of potassium to argon in some rocks can be used to determine the age of the rock. Recently, the first argon compound, argon fluorohydride HArF , was reported , which is stable up to 27 K. I'm waiting for hydrogen to be replaced by boron: I think a molecule that spells out "BArF" would be worth investigating. Or not. Krypton is a colorless, odorless, unreactive gas which liquefies at It is found in the Earth's crust at a concentration of 10 ppt, making it the 81st most abundant element; it is found in the atmosphere at a concentration of 1 ppm by volume.

Krypton which is used commercially is extracted from liquid air by fractional distillation. These lasers produce ultraviolet light, which, due to its short wavelength nm for ArF and nm for KrF , allows for high-precision imaging. Excimer lasers have many industrial, medical, and scientific applications.

They are used for microlithography and microfabrication, which are essential for integrated circuit manufacturing; and for laser surgery, including laser angioplasty and eye surgery. Boundless vets and curates high-quality, openly licensed content from around the Internet.

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