Helium is a chemical element with the symbol He and atomic number 2. It is a colorless, odorless, odorless, non-toxic, and inert monoatomic gas. also, there are uses of helium in which included, the cooling medium, aviation, inflate car balloons. and also the formula of helium He and properties.
What is helium
Helium is followed as an inert gaseous element to group 18 of the periodic table. It is the second element after hydrogen in terms of lightweight, is characterized by being colorless, odorless, and tasteless. Natural atmospheric pressure, in conjunction with a temperature of around 272 ° C to convert it to a solid-state, is also characterized by its low boiling point and freezing compared to the rest of the elements.
Formula of helium
Atomic mass: 4.002602 u
Atomic number: 2
Electron configuration: 1s2
Boiling point: -268.9 °C
The discovery of Helium
It was discovered in 1868 by the French scientist Pierre Jansen, and this discovery was coupled with the presence of helium on the surface of the sun and not on Earth, but he did not realize what this particular element, and successively research and studies finally reached Sir William Ramsay in 1895 to determine the identity of this At the same time, Niels Langlet and Theodore Cliff came to the same conclusion.
This is why there are no known compounds containing helium, because it is a gaseous element, and because its atmospheric content does not exceed 0.0005%, it seeps into space away from the atmosphere. Earth’s gravity is not controlled by this deficiency of helium, which is compensated for by the decay of radioactive elements in the earth’s crust. The alpha molecules resulting from the decay of these elements bind to two electrons and form helium again.
Uses of Helium
The uses of helium vary as follows:
- It is used as a cooling medium for superconducting magnets in magnetic scanners, nuclear magnetic resonance spectroscopy, as well as cooling of space instruments.
- It is used in aviation since it works to save pressure, especially in missiles.
- It works to prevent rust, unlike oxygen gas, which leads to rust if reacted with metals.
- Used to inflate car balloons when an accident occurs due to its rapid spread.
- It is considered a non-flammable gas and this is the motivation behind using it instead of hydrogen in blowing balloons.
- It is used to fill balloons and decorative balloons, depending on its low density.
- It is mixed with oxygen, to facilitate breathing in people with asthma.
- A modern microscope using helium ions has been produced, providing a more accurate picture of the electron microscope.
- This gas is used in deep cooling techniques, the most important of which is the cooling of MRI-based imaging devices.
- Used in detecting leaks, as in automotive conditioning systems.
- A mixture of 80% helium and 20% oxygen is made to be used by divers and others working under stressful conditions.
Properties of helium
It belongs to the noble gas elements in the periodic table and is the second most abundant element in the universe. It is also the second simplest chemical element, its atoms are composed of two protons, two neutrons, and two electrons, a colorless gas, taste, and smell, It is of low density, non-flammable, and is also an inert gas that does not react with any other chemical element.
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