What are the properties of hydrogen and helium?

What are the properties of hydrogen and helium?

Hydrogen and helium are the lightest elements in the periodic table. They exist as gases at room temperature and are the two most common elements in the universe, with hydrogen making up about 75% of all matter.

What is the properties of helium?

Helium has many unique properties: low boiling point, low density, low solubility, high thermal conductivity and inertness, so it is use for any application which can explioit these properties. Helium was the first gas used for filling balloons and dirigibles.

What are the 5 properties of hydrogen?

At standard temperature and pressure, hydrogen is a nontoxic, nonmetallic, odorless, tasteless, colorless, and highly combustible diatomic gas with the molecular formula H2. Hydrogen is also prevalent on Earth in the form of chemical compounds such as hydrocarbons and water.

Where do we find helium?

Where on earth is helium found? Wherever large deposits of uranium are located, Helium will also be found. Most of the world’s Helium comes as a byproduct of decaying uranium and fossil fuels. Today, the world’s Helium supply relies on reserves in the United States, the Middle East, Russia and North Africa.

What are the uses and properties of hydrogen?

Hydrogen also has many other uses. In the chemical industry it is used to make ammonia for agricultural fertiliser (the Haber process) and cyclohexane and methanol, which are intermediates in the production of plastics and pharmaceuticals. It is also used to remove sulfur from fuels during the oil-refining process.

What happens if you breathe pure hydrogen?

Inhalation: High concentrations of this gas can cause an oxygen-deficient environment. Individuals breathing such an atmosphere may experience symptoms which include headaches, ringing in ears, dizziness, drowsiness, unconsciousness, nausea, vomiting and depression of all the senses.

What are the chemical properties of helium ( He )?

Chemical Properties of Helium Helium (He) Chemical Properties Electron Configuration 1s 2 First Ionization Energy 2372.3 kilojoules per mole Second Ionization Energy 5250.5 kilojoules per mole Van der Waals Radius 140 picometers

What makes a hydrogen atom different from a helium atom?

A typical hydrogen atom consist of one proton and one electron, although some contain one or two neutrons and form “isotopes” known as deuterium and tritium, respectively. A hydrogen molecule is a completely different chemical entity: it contains two hydrogen atoms, but its properties and behavior are quite different.

What makes helium a colorless and odorless gas?

The atomic symbol of helium is 4 2He. An atom of helium is composed of 2 protons and 2 neutrons in the nucleus along with 2 electrons in its 1s orbital. Therefore, the atomic mass of helium is 4.002602 amu. At room temperature and pressure, helium is a colorless and odorless gas.

Which is the lightest element hydrogen or helium?

Hydrogen and Helium are the first two elements that are found in the periodic table of elements. Therefore, they are the smallest and lightest atoms on earth. Both of them are gaseous substances. Due to the characteristic features of hydrogen and helium, there are many applications of these gases in industry.