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QR Challenge: Scientists of Atomic Theory

QuestionAnswer
What’s wrong with Dalton’s model? 1.Atoms are divisible 2. made up of protons/neutrons + electrons 3. no electrons aaaa.
Elements are composed of tiny indivisible particles called atoms..
Atoms of the same elements are identical.
Atoms of different elements are different.
Atoms of different elements combine together to create a compound.
In a chemical reaction, atoms are rearranged, but not created or destroyed.
What’s wrong with Thomson’s model? 1. Doesn't explain neutral atom 2. electrons should be outer 3. missing nucleus in the center.
“Plum pudding model”= positively charged spheres atoms with negatively charged electrons scattered throughout.
Plum Pudding model (This model was wrong because it’s missing a nucleus in the center).
Cathode Ray Tube (CRT) Experiment = lead to the discovery of the electrons.
What’s wrong with Rutherford’s model? 1. electrons do not spiral 2. neutrons 3. energy levels.
Rutherford shot alpha particles ( positively charged) through a thin layer of golf foil.
Rutherford predicted that the alpha particles would travelstraight through the gold atoms. Most alpha particles did passed straight through the gold foil, however, a few alpha particles were deflected because of a small dense nucleus in the center while most of the atom’s volume is empty space.
What’s wrong with Bohr’s model? 1. electrons do not orbit around nucleus like planets
Bohr’s model:electrons orbits the nucleus just like how the planets orbit the sun.
In Bohrs model,Electrons are restricted to certain fixed energy level.

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