All isotopes of a given element have the same number of protons in each atom. From left to right, the isotopes are protium ( Isotopes are variants of a particular chemical element which differ in neutron number.
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Because of its incendiary properties and the amount of heat and gas volume that it generates, gunpowder has been widely used as a propellant in firearms, rockets, fireworks, and as a blasting powder in quarrying, mining, and road building.
Gunpowder was invented in 9th century China and spread throughout most parts of Eurasia by the end of the 13th century.
It consists of a mixture of sulfur, charcoal, and potassium nitrate (saltpeter).