Noble Gases

Helium balloons are typically made of a thin, flexible material such as latex or Mylar. The helium gas inside the balloon makes it float due to its low density compared to air. A small valve is usually attached to the balloon to allow for inflation and tying off the balloon.

Atoms of Cl must gain one electron to form a noble gas arrangement, as it needs a full outer shell with eight electrons to achieve stability, similar to the nearest noble gas, argon.

In general, solubility decreases as temperature increases for gases due to the decrease in gas solubility with higher temperatures. Helium shows minimal change in solubility with temperature because it is very nonpolar and does not interact strongly with water molecules, making its solubility relatively insensitive to temperature changes.

No, helium is not a breathable gas for humans. Inhaling helium can result in asphyxiation as it displaces the oxygen needed for survival in the lungs. It is commonly used in balloons and industrial applications.

- molar mass: 34,08 g
- density: 1,363 g/cm3
Mass of H2S: 1,363 x 9,36 = 12,758 g
34,08--------------------------1 mol
12,758-------------------------x
x = 0,374 moles

Helium does not undergo chemical changes under normal conditions because it is a noble gas with a full outer electron shell, making it very stable. Helium can only react under extreme conditions, such as high pressure and temperature, to form compounds with highly electronegative elements.

Krypton is a noble gas that can sometimes exhibit a blue color in certain applications, such as in lighting and laser technology.

Helium gas is also known as He and is sometimes referred to as a noble gas.

Noble gases are typically unreactive due to their stable electron configurations. However, under certain conditions, noble gases can form compounds with highly electronegative elements like fluorine due to the unique properties of fluorine, such as its ability to gain electrons easily and form strong covalent bonds. This can result in the formation of compounds such as xenon hexafluoride (XeF6).

If the central temperature of a star exceeds 100 million Kelvins, as may happen in the later phase of red giants (stars) and red supergiants, then helium can fuse to form beryllium and then carbon.

Hydrogen fusion occurs in stars to create helium. This process, known as nuclear fusion, involves the fusion of hydrogen nuclei to form helium nuclei, releasing large amounts of energy in the process.

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.

But, noble gases like krypton and xenon will form covalent compounds like KrF2 or XeF2 or XeOF4 etc.

no. chlorine is a halogen (a group 17 element) and not a noble gas (a group 18 element). However chloride ion will have the same electronic configuration as the noble gas, argon

As The Balloons are made up helium gas.the helium gas molecules are smaller than air molecules,so they pass through the skin of the balloon .hence ,gradually the balloon becomes airless and looses flight.

Well... none, but... Helium is often found in conjunction with uranium-bearing ores. The reason for this is that when heavy elements decay by the alpha process, they emit an alpha particle, which is a helium-4 nucleus. The amount of helium found in uranium-bearing rocks is therefore dependent on several factors: how much uranium is present, how long it's been there, what the geological conditions are (is the rock porous, is there an impervious dome structure to trap the helium, etc.) and many other things. For these reasons, it's very difficult to give an exact answer beyond noting that it's fairly common that where uranium is found, at least some helium will be found as well.

Oxide ion (O2-) is isoelectronic with neon. Both species have the same number of electrons, which is 10.

The element symbol for the noble gas in the second period is He, which stands for Helium.

all atoms generally do not have charge as the number of protons and number of electrons will be the same.

Helium is denser than hydrogen because as the molecular or atomic mass of a gas increases, density increases as well.

Hydrogen has a molecular gas of about 2 g/mol while helium has an atomic mass of about 4 g/mol.

Helium is the least reactive element, to the point of being unreactive.

Neon is not only produced in a laboratory; it is one of the most abundant elements in the universe, mostly found in the Earth's atmosphere. It is extracted from the air through a process called fractional distillation. Neon gas is also used commercially in lighting, advertising signs, and various other applications.

Helium-3 is not produced; it is a naturally occurring isotope formed through the decay of tritium. It can also be extracted during the operation of nuclear reactors and obtained through the decay of tritium in nuclear weapons.

the covalent radius of argon is 97 pico meter

Helium has two positively charged protons, two negatively charged electrons.

He-3 isotope has 1 neutral neutron, He-4 isotope has 2 neutral neutrons.

There are six noble gases: helium, neon, argon, krypton, xenon and radon. All have completely filled outermost shell. Helium has 2 valence electrons while the other elements have 8 valence electrons.