Physical And Chemical Properties Of Helium

Radon is the only radioactive out of all.

Physical and chemical properties of helium. This group consists of a chemical series of gases including argon, helium, neon, krypton, xenon, and radon. It has a number of unusual properties. The state of superfluid is called helium ii.

They are used in metal industries. The chemical symbol for helium is he. The physical and chemical properties of helium are presented below.

The most important chemical properties of helium include its atomic mass, state of matter, boiling and melting points, and density. Other known elements do not become superfluid at temperatures close to absolute zero. This webelements periodic table page contains physical properties for the element helium

The second lightest element (only hydrogen is lighter), helium is a colourless, odourless, and tasteless gas that becomes liquid at −268.9 °c (−452 °f). In the modern periodic table, group 18 belongs to noble gases. All of the elements have their valence electron shell full, which makes them very stable elements.

But it has no chemical property. Appearance (at stp) colourless gas The physical properties of helium are nothing but the characteristics that are seen without changing the substance into another.

Elements in the same group or column on the periodic table have similar chemical properties. Well it is partly true. The fact that helium is inert and does not form compounds or react to any existing element is its chemical property….” its inability to undergo a change that alters its composition”.[“physical and chemical properties of matter” university of california davis]