Atomic History (After TedEd)

First to day that everything was made up of tiny particle called atoms.

• Thomson

• Dalton

• Democritis

• Rutherford

Stated that compounds are made up of atoms of specific elements in a fixed ratio.

• Rutherford

• Dalton

• Bohr

• Thomson

Tags

NGSS.MS-PS1-1

Discovered the electron.

• Bohr

• Dalton

• Rutherford

• Thomson

Match the model with the scientist.

• Modern Model (Wave Mechanical)

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• Rutherford

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• Bohr (Planetary)

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• Dalton (Hard Sphere)

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• Thomson ("Plum Pudding/Chocolate Chip")

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Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Put the models of the atom in order from 1 (earliest) to 5 (most recent).

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Put the definition of the structure atom in order from 1 (earliest) to 5 (most recent).

• Electrons are in orbits/energy levels around the nucleus.

• Atom is a dense hard sphere.

• Atoms are positively charged spheres with electrons scattered throughout.

• Atom has a positive nucleus in the center surrounded by electrons.

Said that atoms are positive spheres with negative electrons sprinkled throughout.

• Thomson

• Dalton

• Rutherford

• Bohr

Conducted the "Gold Foil" Experiemnt

• Dalton

• Rutherford

• Democritis

• Bohr

In the gold foil experiment, most of the alpha (positive) particles​ (a)   the atom proving it was ​ (b)   , but some of the particles ​ (c)   which showed that the atom had a ​ (d)   nucleus at the center that contained most of the ​ (e)   of the atom.

• negatively charged
• passed through
• mostly empty space
• bounced back
• positively charged
• mass
• charge
• mostly made up of protons
• were destroyed

Tags

NGSS.HS-PS1-8

Found that electrons orbit the nucleus in fixed energy levels.

• Dalton

• Democritis

• Bohr

• Rutherford

• Thomson