Share 1.1 Atomic Theory
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Which particle has a negative charge?
Electron
Proton
Which particle has a positive charge?
Neutron
Proton
Which particle has no charge?
Electron
Neutron
Where are protons found?
Electron cloud
Nucleus
Where are neutrons found?
Outside the atom
Nucleus
Where are electrons found?
Electron cloud
Nucleus
Which particle has the smallest mass?
Proton
Electron
Which two particles are found in the nucleus?
Protons and neutrons
Protons and electrons
What is the charge of an electron?
Positive
Negative
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?
Mostly empty space
Solid indivisible spheres
Who discovered the electron?
Rutherford
Thomson
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
