Worksheets6A Exam Review
Total questions: 25
Worksheet time: 13mins
Electrons orbit a certain distance from the nucleus. Either radiate or absorb energy when jumping orbitals.
Dalton
Thomson
Rutherford
Bohr
The atom is mostly large empty space with a small, dense nucleus at the center
Dalton
Thomson
Rutherford
Bohr
Atom is a positively charged cloud with embedded negative electrons
Dalton
Thomson
Rutherford
Bohr
Atoms are indivisible (cannot be broken down)
Dalton
Thomson
Rutherford
Bohr
What scientist proposed this atomic model?
Dalton
Thomson
Rutherford
Bohr
What scientist proposed this atomic model?
Dalton
Thomson
Rutherford
Bohr
What scientist proposed this atomic model?
Dalton
Thomson
Rutherford
Bohr
What scientist proposed this atomic model?
Dalton
Thomson
Rutherford
Bohr
In a famous experiment conducted by Ernest Rutherford, positively charged alpha particles were scattered by a thin gold foil. Which of the following is a conclusion that resulted from this experiment?
The nucleus is negatively charged
The atom is a dense solid and is indivisible
The mass is conserved when atoms react chemically
The nucleus is very small and the atom is mostly empty space
What subatomic particle was discovered in the cathode ray tube experiment?
Proton
Neutron
Electron
Nucleus
What evidence led Niels Bohr to believe that electrons occupy specific energy levels in atoms?
Excited electrons emit colored light at every possible wavelength.
Excited electrons emit colored light at only certain wavelengths.
Electrons emit colored light only when in an excited state.
Electrons emit colored light only when in ground state.
Check all of Daltons Postulates
All matter is composed of extremely small particles called atoms
All atoms of a given element are identical, having the same size, mass, and chemical properties. Atoms of a specific element are different from those of any other element.
Atoms cannot be created, divided into smaller particles, or destroyed.
Different atoms combine in simple whole number ratios to form compounds.
In a chemical reaction, atoms are separated, combined, or rearranged.
Rutherford's Gold Foil Experiment disproved (a) model (name of model not scientist)
Who discovered the Neutron?
James Chadwick
Niels Bohr
John Dalton
Ernest Rutherford
The current model of an atom today is
Plum pudding model
Quantum mechanical model
Bohr model
Billiard Ball model
Which of these is not associated with J.J. Thomson
Cathode Ray Tube Experiment
Discovery of the nucleus
Plum Pudding Model
Discovery of electron
Arrange!
If-hard-you-study , you-exam.-fail-the won't
(a)
Choose the correct description of J. J. Thomson's Model of an Atom.
The model is a indivisible and indestructible sphere
The model is a sphere in which negatively charged particles - electrons- immersed in a positively charged space of the sphere.
The model is a sphere in which negatively charged particles - electrons- move around the center of an atom creating an electron cloud
The model is a sphere in which negatively charged particles - electrons - move around the nucleus of an atom in a defined passes, called orbits, like planets around the sun
What results did Rutherford expect to see if the Plum-Pudding model is correct?
He expected that most of alpha particles would go through a gold-foil and small number of particles would deflect sightly
He expected that most of alpha particles would not go through a gold-foil and will stop on one side of a foil.
He expected that most of alpha particles would ricochet back after hitting a gold-foil
What results did Rutherford observe in his Gold-Foil experiment?
He observed that all alpha particles did go through a gold-foil in straight lines
He observed that most alpha particles did not go through a gold-foil and stopped on one side of the gold foil.
He observed that a small number of alpha particles bounced off the gold-foil at very large angles
He observed that all alpha particles slightly deflected from the straight line when going through a gold-foil
The Cathode Ray Tube experiment led to this model that was developed by ___.
JJ Thomson
John Dalton
Ernest Rutherford
Democritus
