What are Helia features?

Helium is a chemical element with atomic number 2, which means that the neutral helium atom has two protons and two electrons. The most important chemical properties of helium include its atomic mass, condition of matter, boiling points and melting and density. The element has an atomic compound of 4.0026 grams per pier and the gas is at almost all temperatures and pressure conditions. Helia density is 0.1786 grams per liter at 32 ° F (0.0 ° C) and 101.325 kilopascals (KPA).

Liquid and solid helium can only exist in extremely low -temperature high -pressure conditions. One of the unusual properties of helium is that it cannot exist as a solid or liquid at normal pressures, even at extremely low temperatures. At a pressure of about £ 360 per square inch (2.5 megapascals), the transition between liquid and solid or melting point -458 ° F (0.95 Kelvin). The boiling point is -452 ° F (4,22 Kelvin).

Some of the properties of Helia make it an interesting common subject of study in quantum mechanics. It's because of its low atomicNumber, second simplest atom after hydrogen. Mathematical procedures can be used to analyze the behavior of subatomic particles - protons, electrons and neutrons - in the helium atom. However, such methods cannot determine the behavior of these particles with absolute certainty. Atoms with a larger atomic number that have more subatomical particles tend to be harder to work in terms of quantum mechanical analysis.

Helium is the least reactive of all elements. Helia's unreactive properties arise from the fact that it is the lightest of generally unreactive noble gases. The noble gas has a "full" electron shell, which means that it cannot easily give or receive electrons in a chemical reaction. The replacement or sharing of electrons is the basis for most chemical reactions, so the bidders tend to participate in several chemical reactions. In addition, Helium has only two electrons that could at all participate in the reactionWhile all other noble gases - and in fact all elements except hydrogen - have more.

There are many different uses for helium that result from the chemical properties of helium - especially its low weight, temperature and pressure properties and its low reactivity. For example, Helium is significantly lighter than air, so it is often used to fill balloons so that they can float and airships such as blimpy to fly. Liquid helium, which can only exist during extreme pressures and at very low temperatures, is used as a cooling liquid for superconductors that only take their extremely conductive properties at very low temperatures.