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WorksheetsHistory of Atomic Theory Quiz
Total questions: 15
Worksheet time: 8mins
What is Neils Bohr's contribution to the atomic theory?
Created the atomic theory
Created a model of the atom with electrons moving around the nucleus in a fixed orbits
Discovered that the proton had a positive charge
Believed that atoms of a given element are identical
Discovered the 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
The Quantum Mechanical Model of the atom describes electrons as:
Particles in fixed orbits
Waves with a probability distribution
Particles embedded in a positively charged sphere
Particles in a dense nucleus
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
