Atomic Theory..⚛️

Atomic Theory..⚛️

Assessment

Flashcard

Chemistry

9th Grade

Practice Problem

Hard

Created by

Wayground Content

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10 questions

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1.

FLASHCARD QUESTION

Front

Who proposed the plum pudding model?

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Back

JJ Thomson

2.

FLASHCARD QUESTION

Front

Out of the 3 models, whose model was most flawless? Options: Dalton's, Rutherford's, Bohr's, Thomson's

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Back

Bohr's

3.

FLASHCARD QUESTION

Front

Who conducted the alpha-particle scattering experiment?

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Back

Ernest Rutherford

4.

FLASHCARD QUESTION

Front

The orbits or shells are called ...........?

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Back

Energy levels

5.

FLASHCARD QUESTION

Front

Who was the first person to propose a model for the structure of atom? Options: Neils Bohr, Ernest Rutherford, Dalton, JJ Thomson

Back

JJ Thomson

6.

FLASHCARD QUESTION

Front

Thomson proposed that an atom consists of a negatively charged sphere and the electrons are embedded in it. True or False?

Back

False

Answer explanation

Thomson proposed that - An atom consists of a positively charged sphere and the electrons are embedded in it.

7.

FLASHCARD QUESTION

Front

Assertion Reason - based Question: A : Rutherford selected gold foil for his experiment. R : He wanted as thin a layer as possible.

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Back

Both A and R are true and R is the correct explanation of A

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