Answer:
They demonstrated that substances could combine to form new materials. It was the English chemist, John Dalton, who put the pieces of the puzzle together and developed an atomic theory in 1803. ... Atoms of an element cannot be created, destroyed, divided into smaller pieces, or transformed into atoms of another element.
Middle class. I think? Your question was very confusing.
Hey!~
The correct answer is C. Domino because just like dominoes, neighboring nations fall because of one.
Hope this helps and have a great day!
-Lindsey
