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WorksheetsAtomic Theory Scienctists
Total questions: 16
Worksheet time: 8mins
Name
Class
Date
1.
What is Democritus' major discovery?
a)
Atomic Mass
b)
Atomic Number
c)
Atomos
d)
Most Atoms
2.
What does Atomos mean?
a)
Not to be cut
b)
Big
c)
Within an atom
d)
Atomic Numbers
3.
What experiment is Ernest Rutherford famous for?
a)
Electron experiment
b)
Bananna experiment
c)
Tin foil experiment
d)
Gold foil experiment
4.
Where are metals found on the peiodic table?
a)
On the stair-step line
b)
To the right of the stair-step line
c)
To the left of the stair-step line
5.
Who stated that all atoms of the same element are excacty alike?
a)
Democritus
b)
Dalton
c)
Thomson
d)
Borh
6.
What scientist is best known for his "Plum Pudding" model of the atom?
a)
J.J. Tomson
b)
Ernest Rutherford
c)
John Dalton
d)
Democritus
7.
What contribution did John Dalton make to atomic theory?
a)
He discovered that every atom was positively charged.
b)
He discovered that every element consisted of one type of atom.
c)
He discovered that atoms had nuclei.
d)
He discovered that atoms could be divided into smaller parts.
8.
J.J. Thomson provided evidence that an atom...
a)
is the smallest particle of matter
b)
contains negatively charged particles
c)
has an overall negative charge
d)
has an overall positive charge
9.
Ernest Rutherford discovered that atoms were mostly _________________.
a)
negatively charged
b)
positively charged
c)
electrons
d)
empty space.
10.
Rutherford discovered the...
a)
electron
b)
proton
c)
neutron
d)
nucleus
11.
What kind of atoms did Rutherford use in his experiment?
a)
Gold
b)
Iron
c)
Hydrogen
d)
Nitrogen
12.
Isotopes are elements with a different amount of
a)
protons
b)
neutrons
c)
electrons
d)
atoms
13.
an element will always have the same number of
a)
neutrons
b)
protons
c)
isotopes
d)
atoms
14.
Who discovered the neutron?
a)
Robert Andrews Millikan
b)
James Andrews Millikan
c)
James Chadwick
15.
What did James Chadwick discover in 1932?
a)
Protons
b)
Electrons
c)
Neutrons
d)
Atoms
16.
What did Schrödinger do?
a)
Discover the atom
b)
Discover that the electrons orbit around the nucleus
c)
Believe that the electrons orbit around the nucleus
d)
Discover the electrons floated randomly in a cloud around the nucleus
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