Worksheets6A Review Atomic Theory
Total questions: 10
Worksheet time: 5mins
Who suggested the first atomic theory around 400 BC?
John Dalton
Democritus
Ernest Rutherford
Niels Bohr
Which scientist is credited for discovering the electron?
Ernest Rutherford
Niels Bohr
James Chadwick
J.J. Thompson
What did J.J. Thompson's Plum Pudding model suggest about the placement of electrons and protons in the atom?
They were randomly placed throughout the atom
They were located in the nucleus
They were orbiting the nucleus
They were in fixed energy levels
What did Ernest Rutherford's experiment with alpha particles and gold foil lead to the discovery of?
The existence of protons
The concept of quantum levels
The structure of the nucleus
The behavior of electrons
According to Niels Bohr's theory, how did electrons orbit around the nucleus?
In a straight line
In a circular path
In seven different quantum levels
In a random pattern
What did Niels Bohr use to imply his theory of electrons orbiting in different quantum levels?
The discovery of the nucleus
The Plum Pudding model
The existence of protons
The measurement of the line spectrum given off by each of the electrons
How did Erwin Schrödinger view electrons in his wave mechanics model?
As discrete particles
As continuous clouds
As orbiting the nucleus
As existing in fixed energy levels
What did Erwin Schrödinger develop that is used today to understand atoms and molecules?
The Modern Atomic Theory
The Plum Pudding model
The concept of quantum levels
The wave equation
What did John Dalton's experiments with the proportions of hydrogen to oxygen in different substances lead to?
The theory of atoms bonding in definite proportions
The concept of quantum levels
The Modern Atomic Theory
The discovery of the nucleus
What did Democritus suggest about the composition of all things?
They are made up of protons and electrons
They are composed of minute, invisible, indestructible particles of pure matter
They are continuously moving in infinite empty space
They are composed of fixed energy levels
