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WorksheetsAtomic History & Structure Review
Total questions: 20
Worksheet time: 12mins
Name
Class
Date
1.
Neutrons are found in the...
a)
Nucleus
b)
Electron Cloud
c)
Electrons
d)
Protons
2.
Electrons have a ___________ charge.
a)
Positive
b)
Negative
c)
Neutral
3.
The _____________ is the number of protons and neutrons in an atom.
a)
Atomic Mass
b)
Atomic Symbol
c)
Atomic Number
d)
Atomic charge
4.
The _____________ determines the identity of an object.
a)
# of Protons
b)
# of Electrons
c)
# of Neutrons
d)
Atomic Mass
5.
Who believed that electrons were scattered amongst positively charged material.
a)
JJ Thomson
b)
Ernest Rutherford
c)
John Dalton
d)
Niels Bohr
6.
Believed that atoms are small, hard particles that were "indivisible"
a)
Democritus
b)
Aristotle
c)
Schrodinger
d)
Greek Philosophers
7.
Did experiments to show that atoms form compound in set ratios.
a)
John Dalton
b)
Schrodinger
c)
Niels Bohr
d)
JJ Thomson
8.
Discovered that the atom has a small, dense, positively charged nucleus.
a)
Ernest Rutherford
b)
Heisenberg
c)
Democritus
d)
JJ Thomson
9.
Believed that electrons traveled around the nucleus in definite paths.
a)
Niels Bohr
b)
John Dalton
c)
Modern Atomic Theory
d)
Ernest Rutherford
10.
Determined that electron paths cannot be predicted and exist inside the Electron Cloud.
a)
Schrodinger & Heisenberg
b)
Ernest Rutherford
c)
John Dalton
d)
Democritus
11.
Believed that all atoms of the same element would be the same.
a)
John Dalton
b)
JJ Thomson
c)
Niels Bohr
d)
Modern Atomic Theory
12.
How many protons does an atom with an atomic number of 28 and a mass number of 40 have?
a)
28
b)
68
c)
12
d)
40
13.
The following element has _____________ electrons.
a)
114
b)
289
c)
175
d)
403
14.
The following element has _______________ neutrons.
a)
15
b)
16
c)
31
d)
46
15.
The Bohr model below depicts which element?
a)
Scandium
b)
Titanium
c)
Calcium
d)
Potassium
16.
The following picture represents which atomic model?
a)
JJ Thomson
b)
John Dalton
c)
Ernest Rutherford
d)
Schrodinger & Heisenberg
17.
The following picture represents which atomic model?
a)
Ernest Rutherford
b)
John Dalton
c)
Democritus
d)
Aristotle
18.
The following picture represents which atomic model?
a)
Niels Bohr
b)
Democritus
c)
Schrodinger & Heisenberg
d)
JJ Thomson
19.
The following picture represents which atomic model?
a)
Schrodinger & Heisenberg
b)
John Dalton
c)
Niels Bohr
d)
Ernest Rutherford
20.
Which statement about electrons is true?
a)
Electrons circle the nucleus of the atom
b)
Electrons have a positive charge
c)
Electrons have a mass of 1 amu
d)
Electrons exist in the nucleus of the atom
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