Noble Gases

The chemical symbol is As. The atomic number is 33.

[Kr] 4d10 5s2 5p3

The noble gases of each period have the highest ionization energies in their periods. Refer to the related link to see a graph showing the ionization energies of the elements across each period.

Noble gases such as helium, neon, argon, krypton, xenon, and radon do not readily react with other elements under normal conditions due to their stable electron configuration. They are generally inert and do not form chemical compounds easily.

Noble gases are generally unreactive and do not readily bond with other elements. However, under special conditions or with extreme measures, they can form compounds with highly electronegative elements such as fluorine or oxygen. These compounds are usually unstable and do not occur naturally in large quantities.

of cousre they all are. The only energy like light and sound

Neon is located in the p sublevel.

Helium is used in hospitals for various medical purposes, such as cooling magnets in MRI machines, as a carrier gas for respiratory therapies, and in mixtures for lung function testing. Its relatively low density also makes it useful for creating a positive-pressure environment during surgeries and other medical procedures.

Halogens have 7 valence electrons and nobel gases have 8.

Each atom wants 8 or none electrons according to the octet rule.

Therefore, nobel gases are relatively unreactive b/c they already have 8

Halogens only need 1 more valence electron, making them very reactive.

The boiling points of noble gases increase as you go down the group from helium to krypton. This is because the boiling point is influenced by the strength of the London dispersion forces among the atoms, which increases with molecular size. As the atomic size and mass increase down the group, the London dispersion forces also increase, resulting in higher boiling points.

Helium can be separated from other gasses in a mixture by at least 2 known methods.

By pressurising the helium, regulating tyhe pressure and directing it through a sealed semi-permeable membrane in a pressure housing.The helium molecule being smaller than any of the others (with the sole exeption of Hydrogen, passes through the membrane faster than other gas molecules,and is saved and pumped into storage,while the other gasses are vented off and dumped. The proportion dump gas,which contains some helium can be varied by altering a fine needle valve (variable orifice) .It is a trade off between purity and efficiency. this method reduces the "contaminants" in a helium mix,but does not totally seperate the mixture.This was first marketed for use in diving systems by GDS then Gas Services.

2. By passing it through an absorbent e.g. Molecular Sieve, such as in the "Kinergentics Inc" pressure swing system built in the 1980's

3. It's also possible to use cryogenics to freeze out the different gasses at their various temperatures.

[Ar] 3d5 4s1

A full octet makes the noble gases nonreactive.

The most common container in practice is a gas-discharge lighting unit that has a red light color. The most common natural source is the natural atmosphere, which contains neon in small amounts.

The noble gas notation for uranium is [Rn] 5f3 6d1 7s2. Uranium has 92 electrons, and the notation represents the arrangement of electrons using the nearest noble gas element, radon (Rn), as a starting point.

When a balloon filled with helium or CO2 is placed in the refrigerator, the gas inside the balloon will contract and become denser due to the lower temperature. This will cause the balloon to deflate slightly or shrink in size. Once the balloon is removed from the refrigerator and returns to room temperature, the gas will expand again and the balloon will regain its original size.

Mendeleev couldn't predict the existence of noble gases because they are inert and do not readily form compounds with other elements. Mendeleev's periodic table was based on the properties of elements and their compounds, and since noble gases do not readily form compounds, they did not fit into his classification scheme.

The noble gas notation is a notation formed as a result of the electron configuration notation being used in conjunction with noble gases.

The noble gas preceding the element in question is written then the electron configuration is continued from that point forward.

The notation is shorter to write and makes it easier to identify elements.

The noble gas notation starts for elements after helium.

For example, the electronic configuration of carbon is 1s2 2s2 2p2, whereas its noble gas notation is [He] 2s2 2p2.

When helium is used to fill a balloon, it expands to fill the space inside the balloon due to its low density. The helium gas takes the shape of the balloon because it moves and distributes evenly throughout the balloon's interior.

Helium is placed in a separate group on the periodic table because it is a noble gas with unique properties. Unlike other elements in its period, helium has a full outer electron shell, making it stable and unreactive. This distinguishes it from other elements, leading to its placement in Group 18 (VIII A).

Argon has completely filled valence orbitals and hence is unreactive.

Sodium has one valence electron. If sodium loses this electron it will attain the stable electron configuration of the nearest noble gas (argon) and hence is reactive.

There are two naturally occurring isotopes of helium: He-3 (which is very rare, comprising 0.00014% of naturally occurring helium), and He-4 (which comprises the other 99.99986%of naturally occurring helium).

Whether helium is one type of atom or not then depends on the definition of "one type of atom"; if He-3 and He-4 are considered different types of atom due to their differing numbers of neutrons, then no, helium is not one type of atom; if He-3 and He-4 are both considered the same type of atom due to their common number of protons, then yes, helium is one type of atom.

No carbon dioxide is not a noble gas The noble gasses, sometimes called inert gases, are

Helium

Neon

Argon

Krypton

Xenon

Radon

Ununoctium presumably would behave as a noble gas.

2.Noble gases have 8 electrons in their outer shell(in the exception of helium)

Yes. Argon is the only neutral element with 18 electrons.

However, there can be other ions that can be isoelectronic (having same number of electrons) with argon.

Cations such as K+, Ca2+ or Sc3+ have 18 electrons.

Anions such as Cl-, S2- or P3- have 18 electrons.

Argon is an element that is a gas at room temperature. It can be found in incandescent light bulbs because it is inert.