WorksheetsQuiz: Atomic Theory and Structure
Total questions: 15
Worksheet time: 8mins
Which subatomic particle has a positive electrical charge?
Electron
Proton
Neutron
Positron
Who proposed the first widely accepted atomic theory in the early 1800s?
J.J. Thomson
John Dalton
Ernest Rutherford
Niels Bohr
What is the relative mass of an electron compared to a proton?
Much less (2,000 x smaller)
About the same
Much greater (2,000 x larger)
Zero
Which experiment led to the discovery of the nucleus in the atom?
Gold foil experiment
Cathode ray tube experiment
Oil drop experiment
Double-slit experiment
Where are electrons located in an atom?
In the nucleus
Orbiting the nucleus
In the proton cloud
In the neutron shell
Which scientist's model first included electrons embedded in a sphere of positive charge?
Bohr
Dalton
Thomson
Rutherford
Compare the charges of protons, neutrons, and electrons.
All are positive
Protons are positive, neutrons are neutral, electrons are negative
Protons are negative, neutrons are positive, electrons are neutral
Protons and electrons are positive, neutrons are negative
Which change in the atomic model was necessitated by the results of Rutherford’s gold foil experiment?
Atoms are indivisible
Atoms have a dense, positively charged nucleus
Electrons are in fixed orbits
Atoms are mostly solid
Explain why the discovery of the electron led to a change in the atomic model.
It showed atoms were indivisible
It proved atoms had internal structure
It confirmed atoms were solid spheres
It showed atoms had no mass
Given the following information, determine which subatomic particle is responsible for the identity of an element and justify your answer.
Electron, because it determines the atom’s charge
Neutron, because it affects the mass number
Proton, because the number of protons defines the element
Neutron, because it is found in the nucleus
Analyze how experimental evidence led to the transition from Dalton’s solid sphere model to Thomson’s “plum pudding” model.
The discovery of the neutron required a new model
The observation of cathode ray experiment indicated the presence of negatively charged particles within the atom
The gold foil experiment showed the atom was mostly empty space
The discovery of isotopes led to the change
Which subatomic particle is found in the nucleus and has no electrical charge?
Proton
Neutron
Electron
Positron
What did Bohr's atomic model introduce that was different from previous models?
Electrons are embedded in a positive sphere
Electrons orbit the nucleus in fixed energy levels
Atoms are indivisible solid spheres
Atoms have no internal structure
Like particles _____ and opposite particles _____.
attract, repel
repel, attract
move, stop
stop, move
The strong nuclear forces affects _____.
