Atomic Theory Scientists Crossword

He Pounded up material in his pestle and mortar until he reduced them to smaller and smaller particles.
The Greek word for invisible and where the word atom comes from.
Said there were 4 elements: water, earth, fire, and air.
This person defined an element as any substance that cannot be decomposed into a simpler substance.
Joseph John Thomsom found that ______ used the cathode ray tube because of its negative charge.
Joseph John Tomson developed a model which he called the ______model.
He discovered the charge and mass of an electron by his famous oil drop experiment.
Ernest Rutherford discovered ______ and developed the idea of a nucleus.
This scientist took Rutherford's research further and found the neutron.
Said that electrons were in orbit.
Neils Bohr made a quantum model of the atom called ______.
Atoms are indivisible and ______.
Millikan inference that something had to account for the ______ of the atom.
Protons balance out the negative charge of electrons by producing a ______ charge.
Most of the mass of the atom is in the ______ and electrons orbit it like the planets orbit the sun.
Chadwick had the idea trhat there could be a particle with mass but no charge which he called the ______.
This scientist suggested that orbits were not always circular, but in a pattern he called orbitals.
Bohr's model was incorrect and only fit which element.
This scientist created the Heisenberg Uncertainty Principle.
The Heisenberg Uncertainty Principle states that it is impossible to know simultaneouly the exact position and momentum of a ______.