Question

Write a short note on occurrence of hydrogen gas.

Answer 1

Hydrogen:

• Hydrogen is a chemical element having an atomic number equal to one.
• It was discovered by Henry Cavendish.
• It is a gas with no color and odor and has the lowest density of all gases.
• It is a highly inflammable gas.

Occurrence of hydrogen:

• Hydrogen is the most abundant element in the universe.
• It is the third most abundant element after oxygen and silicon on the earth.
• It is found in gaseous form and being lighter it is found in very less quantities in the atmosphere.

Isotopes of Hydrogen:

• Isotopes of atoms have the same atomic number and different mass numbers due to different numbers of neutrons in the nucleus of the atom.
• Hydrogen occurs in three isotopes that are tritium, deuterium, and protium.
• The most abundant isotope is protium, It constitutes 99.98 % of total hydrogen.
• Deuterium is found as 0.0156% of total hydrogen on the earth.
• The Tritium is radioactive and only found in trace quantities.