People who discovered atoms

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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


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