tell me something about nobel gases?

Answer 1

they are very stable

Answer 2

The noble gases are the elements in group 18 of the periodic table. They are the most stable due to having the maximum number of valence electrons their outer shell can hold. Therefore, they rarely react with other elements since they are already stable. Other characteristics of the noble gases are that they all conduct electricity, fluoresce, are odorless and colorless, and are used in many conditions when a stable element is needed to maintain a safe and constant environment.The existence of noble gases was not known until after the advent of the periodic table. In the late nineteenth century, Lord Rayleigh discovered that some samples of nitrogen from the air were of a different density than nitrogen resulting from chemical reactions. He and William Ramsay theorized that the nitrogen extracted from air was associated with another gas, argon. With this discovery, they realized that a whole class of gases was missing from the periodic table. Eventually all the known noble gases except for helium were discovered in the air, with argon being much more common than the others, and the table was completed. Helium was detected spectrographically in the Sun in 1868. The isolation of helium on Earth had to wait until 1895. Under standard conditions, the noble gases all occur as monatomic gases.

Noble gases have full valence electron shells. Valence electrons are the outermost electrons of an atom and are normally the only electrons which can participate in chemical bonding. According to atomic theory derived from quantum mechanics and experimental trends, atoms with full valence electron shells are extraordinarily stable and therefore do not form chemical bonds.

All of them exihibit an extremely low chemical reactivity, in fact no conventional compounds of helium or neon have yet been prepared. Xenon and krypton are known to show some reactivity in the laboratory. Recently argon compounds have also been successfully characterised.

The noble gases' lack of reactivity can be explained in terms of them having a "complete valence shell". They have little tendency to gain or lose electrons. The noble gases have high ionization energies and negligible electronegativities.

The noble gases have very weak inter-atomic forces of attraction, and consequently very low melting points and boiling points. This is why they are all monatomic gases under normal conditions, even those with larger atomic masses than many normally solid elements.

Ununoctium

Ununoctium is expected to be another noble gas, filling the empty space in the periodic table beneath radon. All its isotopes are likely to be radioactive with a very short half-life in the millisecond range, although it likely will be able to form stable oxides.

Answer 3

well nobel gasses are inert gasses means that they are stable or in the last family
in saying so they have there last level filled up with no valence electrons un like the first and second family
to create a noble gas mix an alkali with a halogens orthe first with the 16th or 17 family but not the last one
because its easier to give away a valence electron than to gain 7.

Answer 4

They don't form compounds with other elements since they have a full valence shell. I heard that scientists were able to force some of the heavier noble gases to react but I'm not sure. Noble gases exist solely in elemental form (i.e. He, Ar etc).

Answer 5

Noble gases have 8 electrons in their outer energy levels(except He which is full with 2) They are inert and do not combine with other elements, The have uses in electric light bulbs because tey do not burn up, They are obtained by fractional distillation of liquid air. They each give off a special color when electricity is run through them. Neon is redorange like a neon light.

Answer 6

the noble gases are placed in the "zero group"of the periodic table.
except radon,all occur in atmosphere.
general electronic configuration is ns2np6 except helium which has 1s2
these are inert.
discovery:henry cavendish found tht 1/125 part of nitrogen didnt show reactivity
rayleigh found the density of N from atmosphre is more than tht of the one produced in labs.
jennisen and Lockyer discovere through D3 line in solar spectrum abt helium.
ramsay ,travers discovered neon.
separation of noble gases involves---
first,by chemical methods
second,adsorption by activated charcoal
separation from liqui air...

hope u r satisfied...

Answer 7

Well for starters its "Noble" gasses... the name comes from the fact that these gasses don't mix with other gasses in the same way that Nobility doesn't mix their blood with commoners. The reason that these gasses don't mix is that the outer shell of electrons surrounding the nuclei of their atoms is completely full of electrons... there is no room for electrons from other nearby atoms or molecules to inter mingle and so they don't readily combine with anything else. For this reason you will find them at the far right of each row of the periodic table.... the group is comprised of Helium, Neon, Radon, Argon, Krypton and Xenon. Argon being the least expensive of these is used in welding to keep oxygen out of the welding area. Helium being lighter than air is used to fill balloons and make your voice sound funny. Neon is widely used in various types of lights. I don't know of any commercial use of Xenon. Radon is toxic.

Answer 8

They are often called inert gasses and are very unreactive. This is because their valence (or outermost) electron shell is completely full, a configuration that gives the gas a very stable nature. Since elements usually bond and react to gain stability, stable elements like noble gasses do not react.