Atomic Structure Flashcards
what was Dalton’s belief of an atom
- were indivisible into smaller parts
- could not be created or destroyed
how did Dalton represent particles
as indivisible, shaded spheres
what model of the atom did J.J Thompson create
the plum-pudding model
what did J.J Thompson believe about the atom
that it was a ball of positive charge filled with randomly scattered, negative electrons that have a negative charge
describe the works of Neils Bohr
Bohr used theory to show that electrons exist in shells
describe the works and subatomic beliefs of James Chadwick
Used experiments to discover the neutron
what did James Chadwick discover about the neutron
1) that it has no charge and is neutral
2) has a mass almost the same as the proton
who discovered the proton
Earnest Rutherford
explain the alpha particle scattering experiment
positively charged alpha particles were fired through gold foil. Some were able to pass straight through but some were scattered in different directions
who was Earnest Rutherford
English physicist
what is the charge of alpha particles
positive charge ( +1 )
what was lined around the experiment
detector screen
why was there a detector screen
to detect where the alpha particles were going after hitting the detector screen
how thick was the gold foil
one atom thick
what was Rutherford’s prediction
the alpha particles should be able to pass through easily and be detected on the other side of the screen
