It probably was as lots of new technology had been invented then.
We are in the 21st Century.
it went from 1900 to 1999 it was a span of 100 years which is also known as a century.
yes
the earliest form of gunpowder was invented sometime around 800 1200 A.D. it was called serpentine powder which consists if potassium, charcoal, and sulfur. it was an unreliable form of black powder.