Atomic Theory Flashcards
The _____ is the positive particle found in an atom.
proton
The electron has a _____ charge.
negative
The _____ is the particle in the atom with no charge.
neutron
_____ discovered indivisible particles.
Dalton
_____ discovered the electron.
Thomson
_____ discovered the nucleus.
Rutherford
_____ discovered the neutron.
Chadwick
_____ discovered the proton.
Rutherford
_____ placed electrons in energy levels.
Bohr
The _____ model states the atom is a positive sphere with randomly scattered negative particles.
plum pudding
The _____ model states the atom has a positive center with electrons placed in fixed paths.
planetary
The _____ model states the atom has a positive center with negative particles scattered randomly throughout.
nuclear
The _____ model states the atom has a positive center with negative particles moving randomly and very quickly within energy levels.
electron cloud
_____ believed matter was composed of fire, air, water, and earth.
Aristotle
_____ was the first person to use the word atom.
Democritus
The electron cloud model is also known as the _____ atomic theory.
modern
_____ was the first person to have positive and negative charges within the atom.
Thomson
_____ discovered the atom is mostly empty space.
Rutherford
_____ believed in continuous matter.
Aristotle
_____ discovered electrons move rapidly creating a blurry “cloud”.
Schrodinger
_____ discovered the first subatomic particle.
Thomson
The _____ model is the first to have a nucleus.
nuclear
The _____ model is the first to have energy levels.
planetary
The _____ model is the first to have neutrons.
electron cloud
The _____ model had no particles inside.
solid sphere
The _____ model was the first to have positive and negative particles inside.
nuclear
The _____ model was the first to have 3 subatomic particles.
electron cloud model
What is the name of Rutherford’s atomic model?
nuclear model
What is the name of Dalton’s atomic model?
solid sphere model
What is the name of Schrodinger’s atomic model?
electron cloud model
What is the name of Thomson’s atomic model?
plum pudding model
What is the name of Bohr’s atomic model?
planetary model
Place the following models in chronological order: planetary model, electron cloud model, plum pudding model, solid sphere model, nuclear model
- solid sphere model
- plum pudding model
- nuclear model
- planetary model
- electron cloud model
What is the name of this model?
nuclear model
What is the name of this model?
electron cloud model
What is the name of this model?
plum pudding model
What is the name of this model?
planetary model
What is the name of this model?
solid sphere model
