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Atomic Theory

DefinitionTerm
This particle is part of the nucleus and is positive proton
This particle is part of the nucleus and is neutral neutron
This particle is outside the nucleus electron
Charge of an electron negative
Charge of the nucleus positive
Overall charge of the atom neutral
Assigned mass of both protons and neutrons in amu's 1
Assigned mass of an electron in amu's 0
Electrons exist in these outside the nucleus energy levels
Electrons in an atom's outermost energy level valence electrons
The locations within each energy level in which electrons are more likely to be are called this orbitals
Because the masses of atomic particles are so small, their masses are shown on the periodic table in these units atomic mass units
This is the abbreviation for an atomic mass unit amu
The nucleus of an atom is made of these two particles protons and neutrons
Valence electrons are found in the energy level that is outermost
Because he said that matter was made of tiny particles he described as atomos, we have the term, atom Democritus
He discovered the electron Thomson
Thomson discovered the electron through this experiment using this instrument cathode ray
The positively charged nucleus was discovered by this man Rutherford
Rutherford did this famous experiment gold foil experiment
Thomson proposed this model of the atom plum pudding model
The gold foil experiment showed that most of the atom is made of this empty space
This man discovered the neutron Chadwick
This man is given credit for discovering the proton Rutherford
This man proposed that electrons orbit the nucleus in circular energy levels Bohr
This man added wave properties electrons giving rise to the electron cloud model Schrodinger
Democritus called atoms atomos because he said they could not be this divided
This is the current model of the atom electron cloud model
Created by: gkarlish
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