The Development Of The Atomic Model Flashcards
What might lead to a change in a scientific model?
New experimental evidence.
What was the initial concept of atoms before discovering electrons?
Tiny spheres that could not be divided.
What did the plum pudding model propose about the atom?
A ball of positive charge with negative electrons embedded.
What did the alpha particle scattering experiment reveal about the atomic mass?
Concentrated at the center (nucleus) with a charged nucleus, replacing the plum pudding model.
How did Niels Bohr modify the nuclear model?
Suggested electrons orbit the nucleus at specific distances, in agreement with theoretical calculations and experimental observations.
What idea emerged from later experiments regarding the positive charge of a nucleus?
It could be subdivided into smaller particles, named protons.
Who provided evidence for the existence of neutrons within the nucleus?
James chadwick
What should students describe about the scattering experiment’s impact on the atomic model?
Why it led to a change in the atomic model.
What should students differentiate between?
Plum pudding model and nuclear model of the atom.
