Hydrogen is the first element in the periodic table and is the lightest element ever known. Its atomic number is 1.
The monatomic form (H1) is the most abundant chemical substance, constituting roughly 75% of the Universe's mass.
Hydrogen is prepared by displacement reaction of metals. In laboratory hydrogen is prepared by the action of sulphuric acid on zinc.
We'll learn more about the chemical properties of hydrogen : combustibility, action on litmus, action with oxygen, chlorine gas, metallic oxide, uses and tests for hydrogen
Learnhive Lesson on Hydrogen