Hydrogen, Chemistry, Short Notes.
(H-1, most abundant), Deuterium (D or H-2), Tritium (T or H-3, radioactive) ➭ The most abundant element in the universe (mostly as diatomic hydrogen, H₂) Hydrogen — Physical properties ➭ Colorless, odorless, tasteless gas ➭ The lowest density of all elements ➭ Highly flammable ➭ Poorly soluble in