Noble Gases

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No, helium is an inert gas and does not readily undergo chemical reactions. It is not a good reducing agent as it does not have the ability to donate electrons to other substances.

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Chlorine need one extra negatively charged electron to be a noble gas.

The noble gas notation for the copper(II) ion (Cu2+) is [Ar]3d9. This notation represents the electronic configuration of copper when all inner shell electrons up to argon are included before the outer d orbital configuration of 3d9.

Argon is an inert gas and is not chemically reactive, so it is not found in living organisms as a constituent element of biological molecules.

Suppose 25 L to be 25 kg water (almost, -0.2% at room temperature)

then divide 25,000 g by the moalr mass of H2O being 2+16=18 g/mole

you get = 1385 moles (because 1 mole = 18 grams)

That depends, if you were going to use it to inflate a balloon, there's other gases to do that. But if you need it for a chemical reaction then I would say no. Helium will be gone 4 years from now which will be 2015. Perhaps the next best thing is to search the gas in another planet which have an atmosphere and same conditions as the Earth.

God bless the sentient race.

Oxygen must gain two electrons to attain noble gas status, which means having a complete outer electron shell. This would give oxygen a full valence shell, similar to the nearest noble gas, neon.

Helium is non-polar because it contains only one type of atom, which results in a symmetrical distribution of electrons around the nucleus. This balanced electron distribution leads to a lack of positive and negative charges on opposite sides of the helium atom, making it non-polar.

Transition metals

Other noble gases such as argon or helium are often mixed with neon in neon signs to produce different colors and brightness levels. Each noble gas emits a unique color when an electric current passes through it, allowing for a variety of hues to be created in a neon sign. Additionally, mixing gases like argon can help enhance the overall brightness and longevity of the sign.

There is no such noble gas with the same electron configuration as helium ion. Helium is the first noble gas, is stable and does not form ions. There can be, however, other ions such as H- or Li+ that will have the same number of electrons as element helium.

Two inert gases are helium and neon. These gases are considered inert because they are highly stable and do not readily react with other elements or compounds under normal conditions.

There are no experiments done with Ununseptium to know, to which family it goes. This element can be halogen or noble gas or chalcogen. This may be known with some upcoming experiments with this element.

The noble gas in the same period as Zr (Zirconium) is Kr (Krypton). Both Zr and Kr are in the fourth period of the periodic table.

To convert moles to grams, you need to use the molar mass of the element. The molar mass of neon is approximately 20.18 g/mol. Given that 0.056 moles of neon are present, you can calculate the grams by multiplying 0.056 moles by the molar mass of neon to get approximately 1.13 grams of neon.

Noble gases have completely filled orbitals / energy levels. They generally have 8 valence electrons (helium has only 2) and have stable electronic configuration. Hence they are chemically inert and generally donot form compounds under normal conditions.

Helium has no net electric charge. And its electronegativity is zero.

Yes, but that is extremely rare as it is a noble gas

They already have the perfect number of electrons in their topmost energy levels. hence they do not form ions. Noble Gases have no reaction to any of the elements under room temperature. However noble gases like krypton or xenon are known to form covalent compounds like KrF2, XeF4, XeOF4 etc.

The volume of any gas at STP (standard temperature and pressure) is 22.4 L/mol. The molar mass of helium is 4.0026 g/mol. So, 84.6 grams of helium would be 84.6/4.0026 = 21.1 mol. Therefore, the volume of 84.6 grams of helium at STP would be 21.1 mol * 22.4 L/mol = 472.64 L.

The atomic mass of Helium is 4.002602. The atomic mass is the combined number of protons and neutrons in the atom.