Atom Models Flashcards

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1
Q

Dalton Model

A

1808

Atoms are small solid spheres, different sizes for different elements

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2
Q

Thomson Model

A

1897

Atoms are made up of a positively charged sphere with negative electrons in the sphere

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3
Q

Nagaoka Model

A

1904

Atoms are made up of a positive sphere with negative electrons orbiting like the planets orbit the sun.

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4
Q

Rutherford Model

A

1911

Atoms are mostly empty space with negative electrons orbiting randomly around the positively charged protons

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5
Q

Bohr

A

1913

Atoms are positively charged protons with electrons orbiting the nucleus in distinct energy shells

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6
Q

Modern Model

A

1920s to present

Atoms have positive protons and neutral neutrons in the positively charged nucleus with negative electrons orbiting the nucleus in distinct energy clouds

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