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500 BCE
500-1600
They we're talking about if metal can grow like plants and the gold can grow, They we're experimenting it to make cheaper gold. they found many new substances but mostly realized the 4 elements is it and no one ever turned the lead into gold. -
450 BCE
450 Bc
Empodocles said that the 4 elements are composed of water,fire,earth,air and these mixed together cna make different substances. he said that even air is invisible it's not nothung it takes up space so it's a form of matter. -
400 BCE
400 BC
A different greek Democritus said that matter is made of tiny particles that can't be broken down. the different elements were composed into atoms. The problem was his idea was never really accepted. -
350 BCE
350 BC
This took place in 350BC. Aristotle created the 4 elements. this was accepted for around 2000 year because his influence and writing was so good. -
1650
An english scientist Robert boyle made the meaning to it and it then became the modern day definition. he also believed that air was a mixture not an element -
late 1700's
Joseph priestly was the first person to scientifically isolate oxygen but he didn't know it was an element. his experiment did find out that air is a mixture not an element because oxygen is one of the things in the mixture. -
1808
by now they knew that matter was made of elements. they say all atoms are are particles that are too small to see. elements differ from non elements they say.
