WorksheetsAtomic Model History
Total questions: 21
Worksheet time: 21mins
Name
Class
Date
1.
Dalton proposed that atoms _____
a)
could be created and destroyed
b)
could be created but not destroyed
c)
could be destroyed but not created
d)
could neither be created nor destroyed
2.
The electron was discovered in 1897. Who discovered it?
a)
Ernest Rutherford
b)
John Dalton
c)
J. J. Thomson
d)
Niels Bohr
3.
Whose model showed atoms as uniformly packed spheres of positive matter filled with negatively charged electrons?
a)
J. J. Thomson
b)
John Dalton
c)
Ernest Rutherford
d)
Niels Bohr
4.
J. J. Thomson won a Nobel Prize in 1906. Which particle did he discover?
a)
the electron
b)
the proton
c)
the neutron
d)
the photon
5.
Whose experiment involved shooting small, positively charged alpha particles at a sheet of gold foil?
a)
J.J. Thompson
b)
Max Planck
c)
Ernest Rutherford
d)
Niels Bohr
6.
Who concluded that atoms consisted largely of empty space with most of the mass concentrated in the center?
a)
J. J. Thomson
b)
Max Planck
c)
Ernest Rutherford
d)
Niels Bohr
7.
Rutherford referred to the center of the atom, where the mass was concentrated, as _____
a)
the kernel
b)
the nucleus
c)
the focus
d)
the heart
8.
Who stipulated that electrons orbit the nucleus at fixed energies and distances?
a)
Albert Einstein
b)
Max Planck
c)
Ernest Rutherford
d)
Niels Bohr
9.
Soon after Bohr's planetary model took center stage, experiments showed that electrons behaved _____
a)
as particles but not waves
b)
as waves but not particles
c)
as both particles and waves
d)
as neither particles nor waves
10.
Who showed it was impossible to determine both the exact position and speed of electrons as they moved around an atom?
a)
Werner Heisenberg
b)
Niels Bohr
c)
Max Planck
d)
Albert Einstein
11.
The current model of the atom, where electrons exist within a range of possible locations, is called _____
a)
the chocolate chip cookie model
b)
the plum pudding model
c)
the quantum model
d)
the planetary model
12.
As electrons circling an atom shift between energy levels, they absorb or release energy in the form of _____
a)
heat at a specific temperature
b)
kinetic energy at a certain speed
c)
light of a specific wavelength
d)
sound waves at a certain intensity
13.
While making his model of an atom, what structure did Rutherford discover (containing protons and neutrons)?
a)
the Nucleus
b)
the Electron Cloud
c)
the quarks
d)
the atomic mass
14.
According to the Bohr Model, electrons are only found in specific orbits around the nucleus called __________________________
a)
Energy Levels
b)
Electron Lanes
c)
Electron Places
d)
Atomic Mass
15.
Which model is this?
a)
Thomson Model
b)
Rutherford Model
c)
Cloud Model
d)
Bohr Model
16.
Who was the Greek philosopher who called the smallest particle of matter as "atomos"?
a)
Democritus
b)
Aristotle
c)
J.J Thompson
d)
Einstein
17.
Who is the scientist who proposed the "solar system" model of an atom where the electrons revolve around the nucleus?
a)
Dalton
b)
Niels Bohr
c)
Ernest Rutherford
d)
Democritus
18.
Which scientist saw the atom as a solid sphere?
a)
Dalton
b)
Thomson
c)
Rutherford
d)
Bohr
19.
Which of the following is/are conclusions based on Rutherford’s gold foil experiment?
a)
Atom is mostly empty space
b)
The nucleus is positively charged
c)
The atom has a small dense nucleus
d)
All answers are correct
20.
all matter is made of what
a)
energy
b)
atoms
c)
electrons
d)
compounds
21.
Where are electrons of an atom found?
a)
Nucleus
b)
Electron Cloud
c)
Some are in the nucleus and some in the electron cloud.
d)
They are moving everywhere.
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