-
500 BCE
the alchemists
founder of basic elements
"introduce the idea that chemical substances are through the combinations of these elements"
discovered the theory that all metals contain mercury and surfer -
400 BCE
Democritus
was the man that stated that everything is composed of atoms and he was the guy that stated that everything was made of matter -
400 BCE
Aristotle
the man that stated that is composed of 4 elements (air earth water matter)
he introduced the theory that atoms are building blocks thought they were tiny uncuttable solid participial -
Lavoisier
know for knowing the mass in chemical reaction -
couloumb
made the advancement of understanding how the charges of electrons work and intact. -
John dalton
was the man that atoms to the naked eye are invisible and are indestructible building blocks
he also stated that different things/objects have different types of atoms -
JJ Thomson
he discovered that all atoms contain tiny negatively charged subatomic particulars or electrons
founder of plum pudding -
the curies
found that radioactivity has a penetrating trait that can be found in uranium materials that the rays can penetrate an atom -
max plancker
founder of the quantum theory. states that energy can be emitted or absorbed only in small units called quanta -
albert einstein
he was the man who made up the view of the matter in the atomic moddel -
robert millikan
measured how much of a charge a single atom had by measuring the amount of charged water droplets in a electrical field but he had to switch to oil because water wasn't good enough -
ernest rutherford
he was the man that put out the nuclear model
he did it through though gold foil -
neils bohr
proposed hydrogen atom theory using the quantum theory
also energy can only move in certain confined space
