Share 1.1 Atomic Theory
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Which particle has a negative charge?
Proton
Electron
Which particle has a positive charge?
Neutron
Proton
Which particle has no charge?
Neutron
Electron
Where are protons found?
Nucleus
Electron cloud
Where are neutrons found?
Nucleus
Outside the atom
Where are electrons found?
Nucleus
Electron cloud
Which particle has the smallest mass?
Electron
Proton
Which two particles are found in the nucleus?
Protons and neutrons
Protons and electrons
What is the charge of an electron?
Negative
Positive
What is the charge of a proton?
Negative
Positive
What is the charge of a neutron?
Neutral
Positive
Who proposed the solid-sphere model of the atom?
Dalton
Thomson
What did Dalton say atoms were?
Solid indivisible spheres
Mostly empty space
Who discovered the electron?
Thomson
Rutherford
What model did Thomson propose?
Nuclear model
Plum pudding model
What did Rutherford's experiment show?
Atoms have a small dense nucleus
Atoms are solid spheres
