History Of The Atom Flashcards
Who were the first people to propose that matter was composed of small particles?
Greek philosophers
Who was the most important Greek philosopher who gave us the name atom?
Democritus
In relation to matter, what did Greek philosophers suggest around 400 BC?
That the tiny particles of which matter was composed were so small that they could not be broken down into even smaller particles i.e. they were indivisible
What was Democritus’ contribution to chemistry?
He put forward the name ‘atom’ to describe the tiny particles of which all matter is composed
Who was the first to put forward an Atomic Theory?
John Dalton
What did John Dalton’s theory state
Definition
All matter is made up of very small particles called atoms
All atoms are indivisible. They cannot be broken down into simpler particles
Atoms are indivisible, what does this mean?
They cannot be broken down into simpler particles
What is all matter made up of (according to John Dalton’s theory)?
Very small particles called atoms
What are atoms said to be since they cannot be broken down into simpler particles?
Indivisible
