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Willingham, Kierra / Module 03: Elements and Compounds
4
3. (03.01 LC)
Match the scientist to his contribution to the atomic theory. (4 points)
1. Niels Bohr
2. J. J. Thomson
3. John Dalton
4. Ernest Rutherford
a. Electra
b. Atoms.
c. Protons
d. Electrons
(03.01 MC)
atomic mass of
amu. (Enter a wh

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Final answer:

Niels Bohr arranged electrons, J.J. Thomson discovered them, John Dalton proposed modern atomic theory based on ratios, and Ernest Rutherford found the positive charge in atoms.


Explanation:

Niels Bohr: Contribution - The arrangement of electrons around the nucleus in energy levels

J.J. Thomson: Contribution - Discovery of electrons

John Dalton: Contribution - Postulated modern atomic theory based on fixed ratios of elements

Ernest Rutherford: Contribution - Discovery that positive charge is concentrated in the center of the atom


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