People who discovered atoms
JJ Thomson: subatomic particles
Discovered the electrom
Niels Bohr: what did he teach us
Electrons can only exist in certain orbits at a specific distance from the nucleus, electrons could jump to higher orbits and when they fell back down they would produce light, of an electron stayed in its orbit it wouldn't lose any energy and fall into the nucleus
Niels Bohr: Subatomic particles
Electrons, protons
Democritus: observation/experiment
He had no evidence because he was a philosopher, he thinks that there are indivisible particles and no one belived him
JJ Thompson: observation/evidence
He performed the cathode ray rube experiment and showed how electrons are smaller than atoms
Ernest Rutherford: observations/evidence
He performed the gold foil experiment and discovered the nucleus and that it has positive particles
John Dalton: experiment/observation
He studies gases by watching steam condense and collected data from experiments, he thinks atoms are indivisible, atoms are all solid with uniform density, people believed him because he actually had evidence
John dalton: what did he teach
He thought us that atoms are not created or destroyed in a reaction, just moved around (law of conservation of mass)
Ernest Rutherford: what did he teach us
He was the first to prove that an atom has a nucleus, unlike what the other scientists thought
JJ Thomson: what did he teach
His experiments showed that atoms are divisible, unlike what the previous scientists thought
Democritus: what subatomic particles did he discover
None because he thought they were indivisible
John dalton: subatomic particles
None because he thought they were indivisible
Ernest Rutherford: picture
Nucleus with protons, big circle around containing electrons
Niels Bohr: picture
Nucleus with protons, surrounded by rings with electrons
Democritus: picture
Particles all the same size and spread oit
John dalton: picture
Particles spread apart and are different sizes
JJ Thompson: picture
Plum pudding model: solid positive mass with electrons
Ernest Rutherford: subatomic particles
Protons, electrons
Aristotle: observation/experiment
Thought earth, fire, and water made up everything
Niels Bohr: observations/evidence
Used the Atomic Emission Spectrum to explain electrons in atoms