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By the mid-1700s there were three known types of air or gases. There was the common air that we breathe, inflammable air now known as hydrogen, and fixed air or carbon dioxide. Clergymen and amateur chemist Joseph Priestley were part of this.
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Some time in the 1700s Priestley was interested in the gas that's produced in the fermentation process he called brewery gas but of course it was well known by that time it was known as fixed air we know it today as carbon dioxide carbon dioxide
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Joseph Priestley had found oxygen. Lavoisier was the first scientist to define what an element was a substance that could not be decomposed by existing chemical means.
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the French Revolution would have terrible consequences for both Lavoisier and his rival Priestley
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when an angry mob frightened that revolution would find its way to England descended on his new home and burnt it to the ground
thanks to it simple priestly escaped unharmed -
Lavoisier and 28 other tax collectors were tried and found
guilty of conspiring against the people of France. He was brought here to Laplace stella revolution that same day May the
8th 1794 and in 35 minutes they were all executed. -
He discovered force electricity to rip apart a caustic chemical called potash and he discovered a new element vivid violence potassium.
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Davy was working away in the basement where he'd adapted
the servants quarters to make a lab he'd been working with some crystalline salts called potash. He discovered an element never seen before called potassium. He added six new elements to
Lavoisier's list and confirmed that substances like chlorine and iodine were also elements. -
Cavendish added a metal zinc to an acid. Bubbles began to appear on the surface. Cavendish started to collect this gas. Cavendish had no idea he discovered a new element called hydrogen. in 1937 hydrogen was witnessed.