Font size
Worksheetshistory of atomic theories
Total questions: 24
Worksheet time: 15mins
Which of these is part of Dalton's atomic theory?
Every element is identical on the atomic level
Atoms are made of elements
Two atoms of the same element are identical
Atoms never interact with other atoms
What's the difference between these two atomic models?
The Bohr model has specific paths for the electrons, whereas the Rutherford model just has electrons wherever
The Bohr model has a nucleus and the Rutherford model doesn't
The Rutherford model has electrons because Rutherford discovered the electron
Rutherford's model is slightly smaller because Bohr felt like he deserved it
The Bohr model is the first atomic model to describe electron shells. What does this mean?
Calcium carbonate exoskeletons to protect the electrons from predators
Special places the electron can be without the nucleus interfering
Levels and paths that the electrons travel around when they orbit the nucleus
Quantum spin probabilities which account for electron momentum
Which is NOT a feature of the Bohr model?
Nucleus in the middle
Electrons on specific paths
Electrons orbiting the nucleus
Neutrons in the nucleus
More than 1 electron
Rutherford's gold foil experiment provided evidence that...
negative and positive charges are spread evenly throughout the atom.
alpha particles have a positive charge.
gold is not a dense as previously thought.
there is a dense positively charged nucleus at the center of an atom.
Which scientist proposed the first atomic theory based on scientific evidence?
J.J. Thomson
John Dalton
Ernest Rutherford
Niels Bohr
According to Dalton's Atomic Theory, atoms of the same element are:
Different in mass and properties
Indivisible and indestructible
Identical in mass and properties
Made up of protons, neutrons, and electrons
J.J. Thomson's Plum Pudding Model suggested that:
Electrons orbit the nucleus in fixed paths
Atoms are indivisible
Atoms consist of a positively charged 'pudding' with negatively charged 'plums' (electrons) embedded in it
Atoms have a dense, positively charged nucleus
What was the main conclusion of Rutherford's Gold Foil Experiment?
Atoms are indivisible
Electrons are embedded in a positively charged sphere
Atoms have a small, dense, positively charged nucleus
Electrons orbit the nucleus in fixed paths
In Bohr's Model of the Atom, electrons:
Are embedded in a positively charged sphere
Move in fixed orbits around the nucleus
Are scattered randomly around the nucleus
Are part of a 'cloud' around the nucleus
Which model of the atom introduced the concept of quantized energy levels?
Dalton's Atomic Theory
Thomson's Plum Pudding Model
Rutherford's Model
Bohr's Model
Who is credited with the discovery of the electron?
John Dalton
J.J. Thomson
Ernest Rutherford
Niels Bohr
Which experiment led to the discovery of the nucleus?
Thomson's Cathode Ray Experiment
Rutherford's Gold Foil Experiment
Bohr's Hydrogen Spectrum Experiment
Millikan's Oil Drop Experiment
In the Quantum Mechanical Model, the region where an electron is likely to be found is called:
Orbit
Orbital
Nucleus
Shell
Who first described matter as being made of small, indivisible, particles?
Ancient Greeks
Ancient Romans
Niels Bohr
John Dalton
Fun (not on the test): These two were research assistants and students of J.J. Thompson
Niels Bohr
Ernst Rutherford
Democritus
John Dalton
Which of the following statements is true about Dalton's Atomic Theory?
Atoms can be created or destroyed in chemical reactions
Atoms of different elements can combine in simple whole-number ratios to form compounds
Atoms are made up of protons, neutrons, and electrons
Atoms of the same element can have different masses
the charge of neutron is
negative
positive
neutral
opposite charges attract, like charges repel each other
True
False
What did Ernest Rutherford's gold foil experiment reveal about the structure of atoms?
Atoms are uniformly packed spheres of positive matter filled with negatively charged electrons.
Atoms consist largely of empty space with just a few electrons.
Electrons orbit the nucleus at fixed energies and distances.
Electrons cannot be pinpointed but exist within a range of possible locations.
What did J.J. Thompson's model of the atom propose?
Atoms are uniformly packed spheres of positive matter filled with negatively charged electrons.
Atoms consist largely of empty space with just a few electrons.
Electrons orbit the nucleus at fixed energies and distances.
Electrons cannot be pinpointed but exist within a range of possible locations.
