How old is the idea that matter is composed of atoms?

The gas would begin to expand, and eventually the can would burst or explode.

They are all decomposition reactions.

Less stable  hope this

Answer it was we, the the whole people, who formed the union. and we formed it, not to give the blessings of liberty, but to secure them: not to the half of ourselves and the half of our posterity, but to the whole people- women as well as men.