History of Atomic Structures

Believed atoms were solid, indivisible spheres.

• Dalton

• Rutherford

• Bohr

• Democritus

Found that electrons in atoms orbit around the nucleus similar to the way planets around the Sun.

• Democritus

• Thomson

• Bohr

• Dalton

Found that atoms are tiny, hard, and uncuttable.

• Schrodinger

• Rutherford

• Democritus

• Thomson

Found that positive charged particles are in the nucleus and negative charged particles surround the nucleus.

• Rutherford

• Democritus

• Schrodinger

• Bohr

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Found that there is a higher probability to find electrons within a space surrounding the nucleus.

• Democritus

• Dalton

• Thomson

• Schrodinger

Used raisins in rice pudding to describe how electrons are distributed in the sphere.

• Thomson

• Rutherford

• Bohr

• Dalton

Described atoms of water as roundballs

• Rutherford

• Democritus

• Bohr

• Dalton

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NGSS.MS-PS1-1

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• A Bohr model

• A Dalton model

• A Rutherford model

• A Thomson Model

Rutherford discovered his concept of an atom before Schrodinger discovered his.

• True

• False

Which of the choices below has the correct order of scientists' discoveries of the structure of an atom?

• Bohr, Democritus, Dalton, Thomson, Rutherford, Schrodinger

• Democritus, Dalton, Thomson, Schrodinger, Bohr, Rutherford

• Democritus, Dalton, Thomson, Rutherford, Bohr, Schrodinger

• Schrodinger, Bohr, Rutherford, Thomson, Dalton, Deomcritus